California Code, Food and Agricultural Code (Formerly Agricultural Code) - FAC § 14403

(a) Notwithstanding Sections 14401 and 14402 of this code and Article 15 (commencing with Section 4196) of Chapter 9 of Division 2 of the Business and Professions Code, medically important antimicrobial drugs may be sold by retailers licensed pursuant to Article 5 (commencing with Section 14321) of Chapter 4 of Division 7 with a prescription or veterinary feed directive from a licensed veterinarian.

(b) This section shall not be construed to invalidate the requirement to obtain a prescription or veterinary feed directive to administer a medically important antimicrobial drug as required by Section 14401.

(c) The department may promulgate regulations to implement this section.