; (2) may not be used to acquire leases or easements of more than 50 years duration or fee title to private property; (3) must be designed to directly contribute to the conservation of an endangered species or threatened species by increasing the species’ numbers or distribution; and (4) must be supported by any private property owners on whose property any grant funded activities are carried out. (c) Priority Priority shall be accorded among grant requests in the following order: (1) Grants that promote conservation of endangered species or threatened species on private property while making economically beneficial and productive use of the private property on which the conservation activities are conducted. (2) Grants that develop, promote, or use techniques to increase the distribution or population of an endangered species or threatened species on private property. (3) Other grants that promote voluntary conservation of endangered species or threatened species on private property. (d) Eligibility for aid (1) The Secretary shall award aid to private property owners who— (A) received a written determination under section 10(l) finding that the proposed use of private property would not comply with section 9(a); or (B) receive notice under section 10(l)(10) that a written determination has been withdrawn. (2) Aid shall be in an amount no less than the fair market value of the use that was proposed by the property owner if— (A) the owner has foregone the proposed use; (B) the owner has requested financial aid— (i) within 180 days after the Secretary’s issuance of a written determination that the proposed use would not comply with section 9(a); or (ii) within 180 days after the property owner is notified of a withdrawal under section 10(l)(10)