(a) The county government may enter into contracts, leases or agreements of any nature pertaining to the operation of the incineration and garbage disposal plant or plants, including the right to sell such portion of land acquired as may not be necessary to use. The power to contract shall include the power to contract with any governmental agency of any sort whatsoever and to receive grants in aid from any such agency or any other person or organization.
(b) The county government may adopt regulations and establish fees and charges for the services rendered by the said incineration and garbage disposal plant or plants.