Notwithstanding any other provision of this chapter, the director shall issue a limited milk inspection certificate to any registered sanitarian employed by any city or county health department who will be employed in connection with an approved milk inspection service. A person holding the certificate shall have full authority to enforce all provisions of this code if this authority is restricted to the inspection and sampling of market milk products in retail outlets and in the inspection of retail establishments licensed pursuant to Section 33704 where an approved milk inspection service has entered into an agreement with the director pursuant to Section 33704.

The limited milk inspection certificate shall be issued following the completion of a certification course that has been approved by the director. This limited milk inspection certificate shall expire upon the termination of employment as a registered sanitarian by the individual or at any time an approved milk inspection service has been terminated.