In accordance with this section, the district council may adopt local laws that establish procedures and requirements for the execution of agreements. A local law adopted under this section by the district council shall authorize the county planning board to: if approved by the district council or County Executive, execute agreements affecting real property in the portion of the regional district in Montgomery County with a person having a legal or equitable interest in the property; and if requested by any party, include a reviewing entity as an additional party to the agreement. A local law adopted under this section may specify the circumstances under which a person may request the negotiation and execution of an agreement, including: the size, use, zoning, or staging plan of the proposed development; or other relevant factors, including: the provision of public benefits or amenities; or growth management policies adopted by the county.