; and (II) if such structure is located within a designated regulatory flood­way, such official has determined that the repair or improvement does not result in any increase in base flood levels during the base flood discharge. (iv) Such official has determined that the variance will not result in increased flood heights, additional threats to public safety, extraordinary public expense, create nuisances, cause fraud on or victimization of the public, or conflict with existing local laws or ordinances. (v) Not more than one claim payment exceeding $1,000 has been made for the structure under flood insurance coverage under this title within any period of 10 consecutive years at any time prior to the granting of the variance. (C) Definitions For purposes of this paragraph, the following definitions shall apply: (i) Agricultural structure The term agricultural structure has the meaning given such term in paragraph (2)(D), except that such term includes not more than one single-family dwelling located on the same property as the agricultural operation, but only if such dwelling is occupied by the owner or operator of the operation. (ii) Floodproofing The term floodproofing means, with respect to a structure, any combination of structural and non-structural additions, changes, or adjustments to the structure that reduce or eliminate flood damage to real estate or improved real property, water and sanitary facilities, structures, or their contents. . 3. Premium rates Section 1308 of the National Flood Insurance Act of 1968 ( 42 U.S.C. 4015 ) is amended by adding at the end the following new subsection: (n) Premium rates for certain agricultural structures with variances Notwithstanding any other provision of this Act, the chargeable premium rate for coverage under this title for any structure provided a variance pursuant to section 1315(a)(3) shall be the same as the rate that otherwise would apply to such structure if the structure had been dry floodproofed. . 4. Levee-impacted areas Section 1360 of the National Flood