California Code, Health and Safety Code - HSC § 106995

(b)(1) No later than July 1, 2019, the department shall permit an applicant to provide either the individual taxpayer identification number or social security number for purposes of applying for a certificate or the renewal of a certificate.

(2) If the department utilizes a national examination to issue a certificate, and if a reciprocity agreement or comity exists between the State of California and the state requesting release of the individual taxpayer identification number or social security number, any deputy, agent, clerk, officer, or employee of the department may release an individual's taxpayer identification number or social security number to an examination or certifying entity, only for the purpose of verification of certification or examination status.

(3) The individual taxpayer identification or the social security number shall serve to establish the identification of persons affected by state tax laws and for purposes of establishing compliance with subsection (a) of Section 666 of Title 42 of the United States Code, Section 60.15 of Title 45 of the Code of Federal Regulations, Section 17520 of the Family Code, and Section 11105 of the Penal Code, and to that end, the information furnished pursuant to this section shall be used exclusively for those purposes.

(4) The department shall not do either of the following: