From and after January 1, 1941, all laws of this state relating to revenue and taxation which, except for this chapter and the act of congress described herein, would not be operative within federal areas, are hereby extended to, and shall be construed as being operative in and upon all lands or premises held or acquired by or for the use of the United States or any department, establishment, or agency of the United States located within the exterior boundaries of the state, to the same extent and with the same effect as though such area was not a federal area: PROVIDED, That nothing in this section shall be construed as extending the provisions of this title to the gross income received from, or to sales made for use in performing within a federal military or naval reservation, any contract entered into with the United States of America, or any department or agency thereof or any subcontract made pursuant thereto for which a bid covering such contract or subcontract was submitted prior to October 9, 1940.