A. For the purpose of providing local full-time public health service, the board of supervisors of a county shall establish a county department of health or a public health services district.

B. The board of supervisors shall not impose any charges on any city or town for public health services unless a valid intergovernmental agreement was in effect during the period being charged.

C. A department of health established pursuant to this article may:

1. Develop health services with the use of any combination of federal, state or local funds.

2. Expend monies budgeted for use of the department with the advice of the local board of health.

D. The department of health services shall prepare a plan for recommendation to the counties, which shall outline a practical grouping of cities and counties of sufficient population and of such area as may be sustained with reasonable economy and efficient administration in order to provide efficient and effective local health services.