The following entities are eligible to obtain a health benefit plan, as defined in Section 22777, subject to board approval:

1. (a) A contracting agency, as defined in Section 20022, a county or special district subject to the County Employees Retirement Law of 1937 (Chapter 3 (commencing with Section 31450) of Part 3 of Division 4 of Title 3), and a school employer.
2. (b) A public body or agency of or within the state that is not subject to Part 3 (commencing with Section 20000) of the Government Code or the County Employees Retirement Law of 1937 (Chapter 3 (commencing with Section 31450) of Part 3 of Division 4 of Title 3), and that provides a retirement system for its employees funded wholly or in part by public funds.
3. (c) The protection and advocacy agency described in subdivision (h) of Section 4900 of the Welfare and Institutions Code, if the agency obtains a written advisory opinion from the United States Department of Labor stating that the organization is an agency or instrumentality of the state or a political subdivision thereof within the meaning of Chapter 18 (commencing with Section 1001) of Title 29 of the United States Code.