PL 84-159, 42 USC 7401, Air Pollution Control Act of 1955
http://www.law.cornell.edu/uscode/42/ch85schIpA.html Compilation of PL 84-159 and PL 88-206
http://www.law.cornell.edu/uscode/42/ch85schIpA.html Compilation of PL 84-159 and PL 88-206
http://www.law.cornell.edu/uscode/text/42/chapter-85/subchapter-I Compilation of PL 84-159 and PL 88-206
http://www.law.cornell.edu/uscode/42/7609.html This act set National Ambient Air Quality Standards (NAAQS), to protect public health and welfare, and New Source Performance Standards (NSPS), that strictly regulated emissions of a new source entering an area.