(iii) the taxpayer receives through the donee a written statement representing that its use and disposition on the property will be in accordance with the provisions of clauses (i) and (ii); and(v) Determination of good current market valueIn the case of any this kind of contribution of evidently wh

"(A) the only real intervening desire or ideal is actually a nontransferable existence curiosity reserved from the donor, or(B) Other contributionsAny charitable contribution in addition to a charitable contribution to which subparagraph (A) or (G) applies shall be allowed to the extent which the mi