What does the 'two unrelated trades' rule mean for a Class B General Building contractor?

Giải thích

B&P §7057(a) defines the general building contractor by a structure whose construction requires the use of at least two unrelated building trades or crafts, and §7057(b) turns that definition into a limit on the prime contracts the contractor may take. (b) converts a scope test into a headcount: the question is what the project requires, and the contractor may self-perform trades its own classification covers. (c) invents a residential limit, while the definition reaches any structure built for the support, shelter, and enclosure of persons, animals, or property. (d) drops the §7057(b) limit, which is exactly what keeps a Class B out of single-trade specialty prime contracts.