S.D. Codified Laws § 34A-16-13
Any county or municipality may enter into a contract for any term of years not to exceed ten years as the governing body may determine with any regional recycling and waste management district for provision by the district of solid waste facilities or services. If any contract entered into pursuant to this section extends for more than one year, an appropriation need not have been previously made concerning such expense, except sufficient to cover the amount payable or estimated to become payable under such contract for the first year thereof. Any such contract shall bind all future governing bodies of the county or municipality and thereafter each such governing body shall annually appropriate an amount sufficient to cover the amount payable or estimated to become payable under such contract during the ensuing fiscal year.
SDCL 34A-16-13