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这两种救济追的是不同的财产。§8400 下的机械师留置权附着于不动产本身，金额由 §8430(a) 确定——所提供工作的合理价值与约定价格中的较低者——并依 §8460(a) 在登记后 90 天内提起诉讼加以强制执行。止付通知追的则是钱：§8520(a) 允许除直接承包商以外享有留置权的索赔人向业主发出该通知，§8530 允许向建设贷款方发出，而 §8500 又使本章成为通往建设资金的唯一途径，因此除依与资金持有人之间的书面合同外，任何人不得就该资金主张其他法律或衡平权利。(a) 把两者完全说反了，还凭空造出一种针对执照的留置权，而那种东西根本不存在。(b) 忽略了不仅追索对象不同、期限也不同——§8412 和 §8414 管的是留置权的登记，对发出止付通知没有半句规定。(d) 凭空造出一种替代关系：付款会让两种救济一起结束，而它们彼此之间并不会转换。

§8416(a) 列明了留置权主张必须包含的内容，而每一项都是关于该主张本身的：扣除一切正当抵扣与冲减后的索赔人主张金额、业主或名义业主的姓名（如知晓）、所提供工作种类的概括说明、雇用索赔人或索赔人向其提供工作之人的姓名、足以识别工地的描述、索赔人的地址、已填写完成的送达证明宣誓书，以及以至少 10 号粗体字印刷的「机械师留置权通知」——整份声明须由索赔人签署并经核证。其中没有一项要求业主的贷款资料，所以 (a) 是凭空加的；也没有一项要求其他分包商的执照号码，这是 (b) 的错；而合同属于证据，而不是留置权文件的必备内容，这是 (c) 的错。§8410 是另一项常绊倒索赔人的条件：只有已发出初步通知并作出送达证明，留置权才可强制执行。

§8416(e) 说得很直接：未按本条规定送达留置权主张的副本（包括 §8416(a)(8) 所要求的「机械师留置权通知」），将使该留置权主张依法不可强制执行。登记只是工作的一半，这正是 (a) 的错处。§8416(c) 规定了如何送达——以挂号、认证或平邮寄出并有交寄证明，寄至业主或名义业主的住所或营业地址，或建筑许可上所载地址，或依 §8174 另行规定的地址——而若无法以此方式送达业主，副本可改为寄给建设贷款方或原承包商。§8416(d) 规定邮件一经交寄，送达即为完成，这也是 §8416(a)(7) 所要求的送达证明宣誓书为何要出现在留置权文件本身之上的原因。(c) 和 (d) 都凭空造出法条并未规定的转换：止付通知是索赔人必须自己另行发出的独立救济，而金钱判决从来只能由法院作出。

私人项目上的停止付款通知须在适用于留置权的相同最外层期限内送达：在未记录竣工或停工通知时，一般须在改良工程完工或停工后90天内送达。记录该等通知会缩短这些期限。

Civil Code §8200要求除总承包商和计工资的劳工之外的每一位债权人，在首次提供劳务、服务、设备或材料后不晚于20天内送达业主、总承包商和建筑贷款人；§8204允许逾期送达但把权利限制在送达前20天及其后。(a)漏掉了代价最大的两个收件人——没有通知贷款人就没有带保证金的停付通知。(c)颠倒了顺序，竣工通知启动的是留置权期限，而不是初步通知的期限。(d)用的90天是§8412登记留置权的期限，不是送达初步通知的期限。

根据Civil Code §8412，总承包商必须在改良工程完工后90天内记录留置权。若业主按§8182记录了完工或停工通知，则总承包商的窗口缩短为该记录后60天（§8412），分包商/索赔人的窗口缩短为30天。90天的兜底适用于未记录NOC的情况。1年窗口混淆了留置权记录与§8460对已记录留置权强制执行的截止日（90天内提起诉讼）。

Civil Code §8460要求索赔人在记录留置权后90天内提起强制执行已记录留置权的诉讼；否则留置权失效且不可执行。索赔人与业主可按§8460(b)以书面协议延长截止日，但最多延至完工后一年。180天的选项不存在。"合同授予后1年"和"4年时效"选项混淆了书面合同违约的时效与远为短促的留置权截止日。错过这90天窗口是分包商失去留置权的最常见方式之一。

§3700 要求加州的每一位雇主确保赔偿金的支付，并且只允许两种方式：向获准在本州承保工人赔偿的保险公司投保，或取得工业关系厅厅长签发的自保同意证书。未做到即构成 §3700.5 下的轻罪，罚款也不轻——§3722(a) 按停工令签发时的在职员工每人 1,500 美元核定罚款，§3722(b) 则按雇主本应缴纳保费的两倍与同样的每人 1,500 美元中的较高者核定。在执照一侧，B&P §7125 要求有雇员的持照人备有现行有效的保险证明（在 2028 年 1 月 1 日之前，没有雇员的持照人可以提交豁免，但持有 C-8、C-20、C-22、C-39 或 D-49 分类者除外；自该日起只有依 §7029 设立且无雇员的合资企业可以豁免）；§7125.2 规定自应当取得保险之日起执照即依法中止。(b) 是一份工资税表格；(c) 是 §7071.19 对有限责任公司另行要求的保险；(d) 属于联邦法，门槛为 50 名全职等量员工。

无雇员的 §7029 合营体现在可以持有豁免;自 2028 年 1 月 1 日 SB 216 版本的 §7125(经 SB 1455 从 2026 年推迟)生效起,它将是**唯一**还能持有豁免的持照人;在此之前,不持有 C-8、C-20、C-22、C-39、D-49 分类的其他无雇员持照人也可以提交豁免。而 §7125.4 规定:一旦雇用员工,该豁免即依法自动失效,若未向 CSLB 备有《工伤补偿保险证明》,执照即被吊销。没有让你去比价投保的宽限期(d),不能等到续期再更新(c),也不需要注销执照(b)。

Civil Code §8200的20天起算点是债权人首次提供劳务、服务、设备或材料之日——本题为7月1日，因此约在7月21日前送达才能保住全部债权；§8204允许更晚的通知成立，但只能追溯到送达前20天及其后。(b)把期限挂在单据上而不是交付上，这是供应商最常犯也最昂贵的错误，因为发票往往数周后才开出。(c)用的登记日关乎留置权顺位，而非通知。(d)借用了其他州的"开工通知"；加州的制度用的是竣工与停工，而不是开工。

Civil Code §9358规定，收到停付通知的公共实体必须从该合同尚未支付的款项中扣留足以清偿该债权并加上合理诉讼费用的金额，且善意扣留可获法定保护。(a)跳过了债权人在扣押账户前必须取得的判决。(b)要求的救济并非该通知所能提供——合同继续履行，停下的只是钱。(c)正是公共工程制度要回应的陷阱：公共财产不能被设立留置权，所以立法者用这一通知和§9550的付款保证金来替代。

§8424(b) 将保证金定为留置权主张金额的 125%——或该主张分配给所解除房产部分金额的 125%——并要求由被认可的担保保险公司出具。一经登记，该不动产即从留置权及任何执行留置权的诉讼中解除，而那 25% 的余量正是用于覆盖索赔人可追偿的利息和费用。登记保证金的一方必须向索赔人发出通知并附保证金副本，索赔人自该通知起有六个月时间就保证金提起诉讼——这与 §8460 就留置权本身提起诉讼的 90 天期限是两个不同的时限。因此 (d) 少了 25 个百分点，(b) 为有争议的留置权凭空打了折，(a) 则错了两处：既不要求现金，而担保保证金恰恰是本条所要求的。

B&P §7071.11(a)写得很明确：保证金不足以全额清偿所有债权时，其金额按各债权人债权数额的比例分配给所有债权人。同一款还将担保人对工资及附加福利债权的累计责任上限定为4,000美元，因此无论工资债权多大，该木工从保证金中最多只能取得4,000美元。(a)是"保证金是消费者优先基金"这一流行误解——§7071.5确实把房主列为受益人，但成为受益人不等于享有优先权。(c)套用了该条款并未采用的先来先得规则。(d)最具迷惑性，因为该条款确实单独提到了工资债权——但它是给工资债权设上限，而不是给它优先权。

Civil Code §2782.05使要求分包商或其保险人为总承包商或业主自身的积极过失提供保险或补偿的条款无效或受限，因此该批单针对的是源于分包商工作及其过失份额的责任，并且分包商的保险人仍须就此类索赔承担抗辩义务。(a)夸大了法条：批单是被限制而不是被废止，附加被保险人承保在加州工程中是常规做法。(b)恰恰是§2782.05所取消的义务。(d)是把批单当成万能保护伞——并非如此，总包自身的过失由总包自己的保单回应。

Civil Code §8400 gives a lien right to a person that provides work authorized for a work of improvement, and lists the direct contractor, subcontractor, material supplier, equipment lessor, laborer, and design professional; §8404 defines authorized work as work requested or agreed to by the owner, or authorized by a direct contractor, subcontractor, architect, project manager, or other person having charge of part of the work. The framing subcontractor is squarely inside that. (b) is the limit that matters: a creditor who contributed nothing to the improvement, such as the contractor's landlord or lender, has no lien. (a) and (c) shrink the class to a single tier, which would leave every subcontractor and supplier without the remedy the chapter was written for.

Civil Code §8412 gives a direct contractor 90 days after completion of the work of improvement to record a mechanics lien when no notice of completion or cessation has been recorded. The shorter deadlines apply only after such a notice is recorded.

Under Civil Code §8414, once a notice of completion (or cessation) is recorded, a claimant other than the direct contractor must record its lien within 30 days. The direct contractor gets 60 days after that notice. Absent any such notice, everyone has 90 days after completion.

Civil Code §8414 gives the direct contractor 60 days after recording of a notice of completion or cessation, while all other claimants get 30 days. If no such notice is recorded, all claimants have 90 days from completion under §8412.

Civil Code §8204(a) says a claimant who did not give preliminary notice is not precluded from giving one later, but is then entitled to record a lien, give a stop payment notice, or claim against a payment bond only for work performed within the 20 days before service, and at any time afterwards. (a) is the harshest misreading — late notice costs the early work, not the remedy. (c) is the mildest, and it ignores the look-back altogether. (b) invents a doubling of the period; nothing in the section extends the 20 days, which is why the practical rule is to serve at the start of every job.

Civil Code §8200 requires a claimant without a direct contract with the owner to serve the preliminary notice on the owner or reputed owner, the direct contractor, and the construction lender if there is one; §8204 makes the notice reach back only 20 days, so late service shortens what can be claimed. (b) omits the owner, whose property the lien attaches to. (c) omits the lender, and that omission specifically costs the claimant the bonded stop payment notice against undisbursed loan funds. (d) confuses the preliminary notice with recording — the preliminary notice is served, not recorded, and serving only the party upstream of you is the most common fatal error.

Civil Code §8200(e)(1) excuses a laborer from giving preliminary notice, and §8200(e)(2) excuses a claimant with a direct contractual relationship with the owner from notifying anyone but the construction lender. §8024 defines laborer as a person who, acting as an employee, performs labor on or bestows skill on a work of improvement, and extends the term to a fund owed part of that compensation. (a), (b) and (c) all lack an owner contract, so each must serve the owner, the direct contractor, and the lender within the §8204(a) 20 days — and an equipment lessor is the one people most often assume is exempt, when §8400(d) gives it a lien right on exactly the same conditions as anyone else.

Civil Code §8200(e) excuses a direct contractor from serving the owner — the contract itself gives the owner notice — but the direct contractor must still give the preliminary notice to a construction lender to preserve rights against the construction funds. (a) inverts the flow: notice runs up the chain toward the people who control the money, not down it. (b) applies the general rule without reading the exception, and is the trap for anyone who memorised '20 days' alone. (c) over-reads the exception, which covers only the owner and not the lender.

Once paid, the claimant records a release of the mechanics lien, and that recorded release is what clears the lien from title. An owner who cannot obtain one has two statutory routes: record a lien release bond of 125 percent of the claim under §8424, which shifts the claimant's remedy from the land to the bond, or, once the claimant's 90 days under §8460 have run without an action, petition for a release order under §8480. (b) is a completion event under §8180(a)(4), which starts deadlines rather than ending a lien. (c) is the §8444 notice an owner who did not contract for the work posts and records within 10 days of learning of it. (d) is the §8200 notice served at the outset to preserve lien rights.

Civil Code §8460 requires the claimant to commence an action to foreclose the mechanics lien within 90 days after recording. If no suit is filed in time (absent a recorded extension), the lien expires and is unenforceable.

A stop payment notice under Civil Code §8500 et seq. directs the owner, or a bonded notice directs the construction lender, to withhold money not yet paid out and hold it against the claim; §8534 sets the owner's duty to withhold. (a) confuses two securities — a claim on the §7071.6 license bond is made against the surety, not through a stop payment notice. (b) describes the mechanics lien, which attaches to the property itself; the point of the stop payment notice is that it reaches the money instead. (c) assumes a levy right that only a judgment creditor has.

Civil Code §8532 obligates a construction lender to withhold only on a bonded stop payment notice, accompanied by a surety bond of 125 percent of the claim; the bond protects the lender if the claim turns out to be bad. (a) is the closest trap: form and verification matter, but no amount of formality substitutes for the bond. (b) reverses the order — the notice works without going to court, which is why it is useful. (c) borrows mechanics lien practice, where recording is the operative act; a stop payment notice is served, not recorded. A notice to the owner under §8534 needs no bond.

A payment bond guarantees payment down the chain: §8608 gives the right of recovery to claimants who provided work to the direct contractor, directly or through one or more subcontractors, and §8612 conditions the claim on the preliminary notice the lien law requires. (a) and (b) both describe a performance bond, which answers to the owner for completion and quality — the two bonds are usually bought together and confusing them is the classic error. (c) is not a bonded obligation at all; financing costs are the owner's own.

Labor Code §3700 requires every employer to secure the payment of compensation, by insurance or by a certificate of consent to self-insure, and one employee triggers it; B&P §7125 then makes a current certificate of workers' compensation insurance or of self-insurance on file with the board a condition of the license itself. A licensee with NO employees may file an exemption statement instead until January 1, 2028, unless it holds a C-8, C-20, C-22, C-39 or D-49 classification; from that date SB 216, as postponed by SB 1455 (Stats. 2024, ch. 485), requires coverage of every licensee except a §7029 joint venture that employs nobody. General liability, commercial auto, and builder's risk are routinely required by contract, by a lender, or by the Vehicle Code for the vehicles themselves, but none of them is made mandatory for contractors by the license law, and none of them pays an injured worker's benefits.

B&P §7125(b), as amended by SB 1455 (Stats. 2024, ch. 485), lets a licensee with no employees file an exemption statement instead of carrying coverage — but only if it does not hold a C-8, C-20, C-22, C-39 or D-49 classification. A roofer is on that list, so the C-39 holder must carry workers' compensation or a certification of self-insurance even with nobody on the payroll (d). (b) is the rule for a painter or a Class B contractor with no employees, and it is the trap here: the classification is what decides it. The list stops mattering on January 1, 2028, when the SB 216 version of §7125 becomes operative and every licensee must carry coverage except a §7029 joint venture with no employees — the roofer's answer is the same either way. (a) and (c) name real policies that cover other risks: general liability answers to third parties, builder's risk to property damage during construction, and neither substitutes for workers' compensation.

Commercial general liability answers for bodily injury and property damage suffered by third parties and arising out of the contractor's operations or completed work, together with the duty to defend those claims. (a) is business income coverage, and a liability policy insures what the contractor owes others rather than what the contractor failed to earn. (b) is workers' compensation, which the CGL expressly excludes. (c) is first-party property coverage — inland marine or a tools floater. Note too the 'your work' exclusion: the CGL does not pay to redo the contractor's own defective workmanship.

Builder's risk is property insurance on the structure and the materials while the project is under way, against perils such as fire, theft, vandalism, and wind; it insures the work itself, and it ends when the project is finished. (b) is the owner's permanent property and liability program, which takes over at occupancy. (c) is commercial general liability, which answers for third-party bodily injury and property damage. (d) is workers' compensation. The line to hold is property coverage on the work versus liability coverage for harm to others.

A certificate of insurance is an informational snapshot: it says that a described policy was in force when the certificate was issued, and it neither amends the policy nor creates rights. (a) is the single most expensive misconception in construction risk transfer — additional insured status comes from an endorsement to the policy, and the certificate merely reports it. (b) reads the 'cancellation notice' box as a promise; most modern certificates disclaim any duty to notify. (c) mistakes the summary for the contract; only the policy and its endorsements grant coverage.

Additional insured status extends the subcontractor's coverage to the prime for liability arising out of the subcontractor's operations, so the sub's insurer may owe the prime a defense and indemnity for those claims. (b) is the dangerous error: the coverage reaches only the sub's work, is capped by the sub's limits, and is subject to the sub's exclusions, so the prime's own exposures remain uninsured. (c) confuses being insured with owning the policy — the subcontractor buys it, controls it, and can let it lapse, which is why the prime asks for the endorsement and for notice of cancellation. (a) has nothing to do with the endorsement.

Suretyship involves three parties — principal, obligee, surety — and the surety guarantees the principal's obligation to the obligee, with a right of indemnity back against the principal. Insurance is a two-party transfer in which the insurer absorbs the insured's fortuitous loss and does not seek reimbursement. (b) describes insurance and labels it a bond, which is why contractors are surprised when a surety pursues them after paying a bond claim. (c) simply reverses the two definitions. (d) reverses who gets paid: the bond pays the obligee, and liability insurance defends and indemnifies the insured.

An indemnity or hold-harmless clause reallocates liability: the indemnitor promises to answer for, and usually to defend, specified claims that would otherwise fall on the indemnitee. It is a contractual device, normally backed by insurance, and it is bounded by Civil Code §2782, which voids indemnity for the promisee's own sole negligence or willful misconduct, and by §2782.05, which restricts a subcontractor's indemnity of a general contractor's active negligence. (a) describes a delay or liquidated damages clause. (b) inverts the usual pairing, since a promise to indemnify is only as good as the indemnitor's balance sheet, which is why insurance is required alongside it. (c) belongs to the lien law and cannot be achieved by an indemnity clause.

Civil Code §8416 requires the claimant to serve the owner with the lien and the statutory Notice of Mechanics Lien, and to record a proof of service affidavit with the lien; without it the lien is unenforceable. (a) is the most attractive wrong answer and fails on two counts — the preliminary notice is served rather than recorded, and it is not attached to the lien. (b) confuses proof of the debt with the recorded claim; the contract is evidence in the foreclosure action, not a recording requirement. (d) has no place in the lien statute at all.

Civil Code §8416 conditions enforceability on serving the owner or reputed owner with a copy of the lien and the statutory Notice of Mechanics Lien, and recording a proof of service affidavit with it. (a) borrows the §8460 deadline and shrinks it — the claimant has 90 days after recording to sue, not ten. (c) reverses who bonds: the 125 percent bond under §8424 is the owner's tool for clearing the lien from title, not a claimant's prerequisite. (d) would make the lien consensual, which defeats its purpose as a statutory security a claimant can assert without the owner's agreement.

Civil Code §8444(a) lets an owner of the property, or a person claiming an interest in it, that did not contract for the work of improvement give notice of nonresponsibility; it must be signed and verified, state the nature of the owner's title or interest, name any purchaser under contract or lessee known to the owner, and state that the person giving it is not responsible for claims arising from the work. §8444(e) is the trap: the notice is ineffective unless, within 10 days after the owner learns of the work, the owner BOTH posts it on the site and records it. (a) and (b) are claimants' instruments, not an owner's. (c) is the owner's completion filing, which shortens the deadlines in §8412 and §8414 but disclaims nothing.

Under Civil Code §8444, an owner must post the notice of non-responsibility in a conspicuous place on the property and record it within 10 days after first having knowledge of the work of improvement to disclaim responsibility for liens.

Civil Code §8180 defines completion to include actual completion, occupation/use plus cessation of labor, acceptance by the owner, or cessation of labor for 60 continuous days. Merely mailing a final invoice is not a statutory completion event.

Under Civil Code §8188, an owner may record a notice of cessation after labor has ceased for a continuous 30-day period. Recording it shortens the lien-recording deadlines for claimants (30 days for others, 60 for the direct contractor), similar to a notice of completion.

In a surety bond, the principal is the party whose obligation is guaranteed (e.g., the contractor). The obligee is the party protected (e.g., the owner or public agency), and the surety is the company issuing the bond and guaranteeing the principal's performance.

The obligee is the party for whose benefit the bond is written and who may make a claim if the principal fails to perform. On a public works performance bond, the public agency is the obligee; on a payment bond, unpaid subs and suppliers are protected.

Civil Code §8424 lets an owner, contractor, or anyone with an interest record a surety bond of 125 percent of the lien to free the title; the claimant's remedy then runs against the bond instead of the property. (b) points the wrong direction — a stop payment notice is a claimant's remedy that traps funds, not an owner's tool for clearing title. (c) is a real instrument with a real effect on deadlines under §8414, but it does nothing about a lien already recorded. (d) addresses work ordered by a tenant or other non-owner, and cannot remove a lien that has already attached.

Civil Code §8204(a) requires the preliminary notice to be given not later than 20 days after the claimant has first furnished work on the work of improvement, and a claimant who gives it later may claim only for work provided within the 20 days before service and afterwards. (d) is the most attractive wrong answer, since a subcontract is often signed weeks before anyone mobilizes and the statute counts furnishing rather than signing. (c) reverses the purpose of the notice, which is served before there is any payment problem. (a) confuses the two instruments: the notice comes first, and §8410 makes it a condition of enforcing the lien that is recorded later.

Additional insured status gives the upstream party defense and indemnity under the downstream party's policy for claims arising out of that party's work, and the certificate documents that the coverage was placed. (a) is the dangerous version of the idea: risk transfer supplements the general contractor's own coverage and never replaces it, and its own insurer will still be looking at the claim. (b) mixes insurance with lien priority, which is fixed by the mechanics lien statute and not by an endorsement. (c) crosses two lines of coverage — employee injuries are handled by each employer's workers' compensation policy, which additional insured status does not touch.

Labor Code §3706 lets an employee of an employer that failed to secure the payment of compensation bring an action at law for damages as if the workers' compensation division did not apply, and §3708 presumes the injury was a direct result of the employer's negligence, places the burden of rebutting that on the employer, and strips the defenses of contributory negligence, assumption of risk, and negligence of a fellow servant. §3700.5 adds misdemeanor exposure. (a) invents a recovery fund California does not maintain for contractors, which is why the §7071.6 bond matters. (b) is the exclusive-remedy bargain the employer forfeits by going uninsured. (d) inverts the consequence of being uninsured.

B&P §7125.2 suspends the license automatically, by operation of law, effective on the earlier of the date the coverage lapsed or the date coverage was required to be obtained; work performed during the suspension is unlicensed work, with the §7031 collection bar and disgorgement exposure that follows. (d) borrows the 90 days from §7071.7, which lets the Registrar accept a BOND as of its effective date if it arrives within 90 days — there is no such grace period for insurance. (b) is the no-harm-no-foul belief, and the suspension does not wait for an injury. (c) is not a remedy anywhere in the chapter.

Having no direct contract with the owner, the supplier falls under Civil Code §8200 and must serve the owner or reputed owner, the direct contractor, and the construction lender if there is one. (a) is the error suppliers actually make — notifying the customer they invoiced, which preserves nothing. (b) stops one link short of the owner, and the owner is the party whose property is at risk. (d) is incomplete in the way that costs the most: without notice to the lender the supplier loses the bonded stop payment notice against undisbursed loan funds.

A performance bond runs to the obligee — usually the owner or the public entity — and guarantees performance of the contract; if the contractor defaults, the surety may complete the work itself, tender a replacement contractor, or pay damages up to the penal sum of the bond. (a) is the payment bond's job, and the two are usually bought together: on private work Civil Code §8608 fixes who may claim on it, and on public work §9550(a) requires one on any contract over $25,000. (b) is the lender's decision, which no surety guarantees. (c) is a separate statutory duty under B&P §7125 and Labor Code §3700.