Health & Saf. Code, § 41752

(a) At the earliest feasible date, but not later than July 1, 1997, the state board shall do all of the following:

(1) Evaluate the emissions from the operation of portable equipment and identify emission reduction technologies that may be applied to portable equipment.

(2) After holding at least one public hearing, establish, by regulation, emission limits and emission control requirements, consistent with Section 41754, and an optional registration program for portable equipment that is, or may be, used in more than a single district.

(b) The registration program shall take effect on the date specified by the state board in the regulation, but not later than 180 days from the date that the state board adopts the regulation.

(c) The program shall provide for the voluntary registration of portable equipment, and may provide for the renewal of a registration not more than once every three years.

(d) (1) The state board may establish a schedule of fees for purposes of this article to be assessed on persons seeking to register, or to renew the registration of, portable equipment. The state board may establish separate fees for the initial registration and for the renewal of a registration. The fees charged, in the aggregate, shall not exceed the reasonable cost to the state board of administering the registration program, and adopting the regulations specified in Section 41754.

(2) The state board shall, in adopting the regulations specified in Section 41754, include a uniform statewide district fee schedule for the recovery of the reasonable costs of enforcement pursuant to Section 41755.

(e) Notwithstanding Section 41754, the state board may periodically revise and update the regulations adopted pursuant to this section, including, but not limited to, revising and updating a determination of best available control technology (BACT) for portable internal combustion engines.