The commissioner may adopt, repeal, or amend forms and regulations that are necessary to effectuate the intent of the Legislature in carrying out this chapter. These forms and regulations and any order, permit, decision, demand, or requirement issued by the commissioner shall be in writing and adopted pursuant to the Administrative Procedure Act (Chapter 3.5 (commencing with Section 11340) of Part 1 of Division 3 of Title 2 of the Government Code).