(1) Approval to construct shall not relieve any owner or operator of the responsibility to comply fully with applicable provisions and requirements under local, state or federal law.

(2) At such time that a particular source or modification becomes a major stationary source or major modification solely by virtue of a relaxation in any enforceable limitation which was established after August 7, 1980, on the capacity of the source or modification otherwise to emit a pollutant, such as a restriction on hours of operation, then the requirements of ARM 17.8.819 through 17.8.828 shall apply to the source or modification as though construction had not yet commenced on the source or modification.