For the purpose of classification, the contracting business includes any or all of the following branches:
(a) General engineering contracting.
(b) (1) General building contracting.
(2) Residential remodeling contracting.
(c) Specialty contracting.
(Amended by Stats. 2020, Ch. 364, Sec. 2. (SB 1189) Effective January 1, 2021.)