Section 260.310 - Contractual authority, powers1. The authority of the district shall not extend to any county within the region which has not joined the district.2. The district may enter into a contract with any city or county within the district to provide all or part of the solid waste management services for the city or county. A city or county shall not be required to meet the provisions of section 260.220 or of section 260.325 if a district includes the city or county within its solid waste plan and the city or county has by contract given the district complete authority for managing the solid waste of the city or county.3. The district and the counties and cities within the district may enter into whatever contracts or agreements they deem necessary to fulfill their responsibilities under this chapter. Nothing in this section shall preclude the transfer of solid waste outside the boundaries of the district.4. Contracts issued for the collection or disposal of solid waste in cities, counties, and districts shall not require either security instruments or performance bonds in excess of twenty percent of the total cost of the contract.5. Any county or counties which are within a solid waste management district may, in cooperation with the district, require by ordinance or order that any solid waste transported from outside the district to a solid waste processing facility or solid waste disposal area within the district be subject to the same requirements as solid waste originating from within the district as set forth in the solid waste management plan under section 260.325, including the separation of recyclable or compostable materials from the solid waste stream before entering a district's solid waste management system.6. A solid waste management district may be created and incorporated in each solid waste management region as provided in sections 260.200 to 260.345 and may exercise the powers granted to it in sections 260.200 to 260.345.