Notwithstanding any provision of this chapter, the requirements of this chapter do not apply to either of the following:
(a) An electrical corporation that has 60,000 or fewer customer accounts within California.
(b) A public utility district that receives all of its electricity pursuant to a preference right adopted and authorized by the United States Congress pursuant to Section 4 of the Trinity River Division Act of August 12, 1955 (Public Law 84-386).