; (iv) subject the land in which an interest is purchased to an urban agricultural land easement plan that describes the activities which promote the long-term viability of the land to meet the purposes for which the easement was acquired; and (v) do not limit the generation of profit through agricultural activities on the land. (D) Substitution of qualified projects An agreement shall allow, upon mutual agreement of the parties, substitution of qualified projects that are identified at the time of the proposed substitution. (E) Effect of violation If a violation occurs of a term or condition of an agreement under this subsection— (i) the Secretary may terminate the agreement; and (ii) the Secretary may require the eligible entity to refund all or part of any payments received by the entity under the program, with interest on the payments as determined appropriate by the Secretary. (5) Certification of eligible entities (A) Certification process The Secretary shall establish a process under which the Secretary may— (i) directly certify eligible entities that meet established criteria; (ii) enter into long-term agreements with certified eligible entities; and (iii) accept proposals for cost-share assistance for the purchase of urban agricultural land easements throughout the duration of such agreements. (B) Certification criteria In order to be certified, an eligible entity shall demonstrate to the Secretary that the entity will maintain, at a minimum, for the duration of the agreement— (i) a plan for administering easements that is consistent with the purpose of the program; (ii) the capacity and resources to monitor and enforce urban agricultural land easements; and (iii) policies and procedures to ensure— (I) the long-term integrity of urban agricultural land easements on eligible land; (II) timely completion of acquisitions of such easements