4. In accordance with the "Administrative Procedure Act," P.L.1968, c.410 (C.52:14B-1 et seq.), the commissioner shall propose within six months and adopt within nine months rules and regulations to effectuate the provisions of P.L.2022, c.139 (52:27D-132.1 et al.), including rules that provide for: the use of supplemental shared services agreements; the authorization of private on-site inspection agencies by the department to conduct on-site inspections; and the use of private on-site inspection agencies by municipalities and enforcing agencies. In addition to the activity described in subparagraph (b) of paragraph (3) of subsection e. of section 14 of P.L.1975, c.217 (C.52:27D-132), the rules and regulations shall allow an enforcing agency to:
a. enter into a supplemental shared service agreement or contract with a supplemental private on-site inspection agency to conduct an on-site inspection for the purpose of meeting all required inspection timeframes;
b. enter into an agreement with a private on-site inspection agency to conduct an on-site inspection on a project-specific basis; and
c. authorize the owner, agent, or other authorized person in charge of work to directly contract with an authorized private on-site inspection agency to perform all inspections on a project-specific basis.