If the county health department or the administration of county health functions are not under the direction of the health officer, the county board of supervisors shall ensure that the health officer has sufficient authority and resources and the organizational structure does not impede the health officer from carrying out the duties required under Section 100575 of, Chapter 1 (commencing with Section 101000) of Part 3 of Division 101 of, Article 1 (commencing with Section 101025) of Chapter 2 of Part 3 of Division 101 of, Chapter 2 (commencing with Section 123150) of Part 1 of Division 106 of, and Sections 123740 and 123745 of, the Health and Safety Code.