The Secretary of the Treasury, upon the certification of the Secretary of Agriculture, shall pay to the State of Minnesota, at the close of each fiscal year from any national-forest receipts not otherwise appropriated a sum of money equivalent to three-quarters of 1 per centum of the fair appraised value of such national-forest lands as may be situated within the area described in section 577d–1 of this title at the end of each fiscal year; and the payments made hereunder shall be distributed to each of the three aforesaid counties in conformity with the fair appraised value of such national-forest lands in each county: Provided, That the fair appraised value of the lands shall be determined by the Secretary of Agriculture at ten-year intervals and his determination shall be conclusive and final: Provided further, That the first payment to the State of Minnesota under the provisions of this section shall be due at the close of the fiscal year 1959: And provided further, That the provisions of section 500 of this title, shall not be applicable to the national-forest lands to which this section applies.