Cal. Bus. & Prof. Code § 4999.23
(a) Notwithstanding Section 4999.30, a person who holds a license in another jurisdiction of the United States as a professional clinical counselor may provide professional clinical counseling services in this state for a period not to exceed 30 consecutive days in any calendar year, if all of the following conditions are met:
(b) A person who intends to provide professional clinical counseling services pursuant to this section shall provide the board with all of the following information before providing services: