K.S.A. 65-209

If the governing body of any city or county which has entered into an agreement to establish a joint board of health shall adopt a resolution declaring its intention to withdraw from such agreement and joint board of health, and shall give written notice thereof on or before July 15, of any fiscal year to each municipality which is a party to the agreement, such city or county may withdraw from such joint board of health and agreement at the end of such fiscal year.