Consistent with the provisions of subsection 4(b) of the Noise Control Act of 1972, as amended (42 U.S.C. 4903(b)), each and every single activity or facility, including noise emission sources or classes thereof, located at Fort Allen, are exempted from compliance with the provisions of that Act; except that no exemption is hereby granted from Sections 6, 17 and 18 of that Act (42 U.S.C. 4906, 491