Cal. Bus. & Prof. Code § 11003.4
(b) A limited-equity housing cooperative or a workforce housing cooperative trust shall be exempt from the requirements of this chapter if the limited-equity housing cooperative or workforce housing cooperative trust complies with all the following conditions:
(3) A regulatory agreement that covers the cooperative for a term of at least as long as the duration of the permanent financing or subsidy, notwithstanding the source of the permanent subsidy or financing, has been duly executed between the recipient of the financing and either one of the lenders or funding sources specified in paragraph (1) or a local public agency in whose jurisdiction the cooperative is or will be located. The regulatory agreement shall meet standards of the Department of Housing and Community Development and make provision for at least all of the following: