The unit may adopt, and from time to time amend and repeal, rules or regulations, not inconsistent with this part, to carry into effect the powers and purposes of the unit and the conduct of its business. If the unit acts by rule or regulation, the rule or regulation shall be adopted, amended, repealed, and published in accordance with Chapter 3.5 (commencing with Section 11340) of Part 1 of Division 3 of Title 2 of the Government Code.