; (ii) an areawide market analysis or survey; (iii) another industry-approved method; (iv) a methodology used by another Federal agency; (v) a model for valuation developed by a research institution; or (vi) a method of valuing ecosystem services associated with protected water rights. (C) Reimbursable costs (i) In general Except as provided in clause (ii), the Secretary shall provide a payment under subparagraph (A)(ii) to an eligible entity as a reimbursement after the costs described in that subparagraph are incurred by the eligible entity. (ii) Limited resource landowners In the case of eligible water rights or eligible land owned by a limited-resource landowner, as determined by the Secretary, the Secretary shall provide a payment under subparagraph (A)(ii) in advance as part of an agreement described in paragraph (4). (D) Lower Federal share option (i) In general An eligible entity may elect to enter into an agreement described in paragraph (4) under which the Federal share does not exceed 25 percent of the fair market value of the groundwater conservation easement, as determined under subparagraph (B). (ii) No right of enforcement Notwithstanding paragraph (4)(C)(iii), an agreement with respect to which an eligible entity makes the election under clause (i) shall not include a right of enforcement for the Secretary. (E) Permissible forms The non-Federal share provided by an eligible entity under this paragraph may comprise— (i) cash resources; (ii) a charitable donation or qualified conservation contribution (as defined in section 170(h) of the Internal Revenue Code of 1986) from the landowner from which the groundwater conservation easement will be purchased; (iii) costs associated with securing a deed to the groundwater conservation easement, including the cost of appraisal, survey, inspection, and title