Section 12665 - Inspection Service -Tuna(a) The inspection of all fish for canning purposes shall be under the direction of the Chief of the Bureau of Food and Drug Inspections of the Department of Public Health. The inspector on duty at each plant shall observe that all operations are carried out in a sanitary manner and in a manner to prevent the canning of decomposed fish, and shall immediately report to his superior any unusual or objectionable practice.(b) In order to facilitate and expedite the administration and enforcement of the aforementioned acts and these regulations each canner may select sufficient personnel from his own employees who shall be trained by an inspector of the bureau to examine fish. The supervising inspector shall notify each canner in writing the names of employees of each company who are approved by the bureau as fish examiners.(c) The detailed examination of the fish shall be made by an inspector or an approved cannery fish examiner under the supervision of an inspector. The inspector shall specify the number of cannery fish examiners required, in accordance with the condition of fish in process from time to time, and the canner immediately shall supply the number so specified, referring any difference of opinion in this regard to the inspector in charge of the district. The approved cannery fish examiners shall at all times be under the direction of the inspector in charge at the plant while they are performing the duty of examining fish. The inspector in charge at the plant may call upon the cannery management for an approved substitute whenever any authorized cannery fish examiner is, in the opinion of the inspector, doing his work unsatisfactorily. In the event such substitution is not immediately made, an inspector shall be assigned to replace him until an approved substitute is available. The canner involved shall not receive or pack any fish until a proper substitute or an inspector is available. All costs shall be assessed against the canner involved.(d) The inspector in charge of the district shall have full authority over the activities of his subordinates while assigned to the respective canneries.Cal. Code Regs. Tit. 17, § 12665