Cal. Business and Professions Code § 650.1

(a) Any amount payable to any hospital, as defined in Section 4028, or any person or corporation prohibited from pharmacy permit ownership by subdivision (a) of Section 4111 under any rental, lease or service arrangement with respect to the furnishing or supply of pharmaceutical services and products, which is determined as a percentage, fraction, or portion of (1) the charges to patients or of (2) any measure of hospital or pharmacy revenue or cost, for pharmaceuticals and pharmaceutical services is prohibited. (b) Any lease or rental arrangement existing on the effective date of this section shall be in full compliance with subdivision (a) by January 1, 1986. (c) Any lease or rental agreement entered into prior to January 1, 1980, that extends beyond the effective date of this section shall be construed to be in compliance with this section until its expiration or the expiration of any option which is contained in any such lease or rental agreement provided that the lease or rental agreement contains provisions which limit pharmacy charges to the amounts not in excess of the prevailing charges in similar hospitals in the general geographic area. (d) The California State Board of Pharmacy, the Medical Board of California, and the State Department of Health Services shall enforce this section and may require information from any person as is necessary for the enforcement of this section. It shall be the duty of the licensees of the respective regulatory agencies to produce the requisite evidence to show compliance with this section. Violations of this section shall be deemed to be the mutual responsibility of both lessee and lessor, and shall be grounds for disciplinary action or other sanctions against both.