<Table> Clean Air Act <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Th> Long title </Th> <Td> An Act to improve, strengthen, and accelerate programs for the prevention and abatement of air pollution . </Td> </Tr> <Tr> <Th> Acronyms (colloquial) </Th> <Td> CAA </Td> </Tr> <Tr> <Th> Nicknames </Th> <Td> Clean Air Act of 1963 </Td> </Tr> <Tr> <Th> Enacted by </Th> <Td> the 88th United States Congress </Td> </Tr> <Tr> <Th> Effective </Th> <Td> December 17, 1963 </Td> </Tr> <Tr> <Th_colspan="2"> Citations </Th> </Tr> <Tr> <Th> Public law </Th> <Td> 88 - 206 </Td> </Tr> <Tr> <Th> Statutes at Large </Th> <Td> 77 Stat. 392 </Td> </Tr> <Tr> <Th_colspan="2"> Codification </Th> </Tr> <Tr> <Th> Titles amended </Th> <Td> 42 U.S.C.: Public Health and Social Welfare </Td> </Tr> <Tr> <Th> U.S.C. sections amended </Th> <Td> 42 U.S.C. ch. 85, subch . I § 7401 et seq . </Td> </Tr> <Tr> <Th_colspan="2"> Legislative history </Th> </Tr> <Tr> <Td_colspan="2"> <Ul> <Li> Introduced in the House as H.R. 6518 by Kenneth A. Roberts (D--AL) on July 9, 1963 </Li> <Li> Committee consideration by House Energy and Commerce </Li> <Li> Passed the House on July 24, 1963 (275 - 104) </Li> <Li> Passed the Senate on November 19, 1963 (passed voice vote, in lieu of S. 432) </Li> <Li> Reported by the joint conference committee on December 5, 1963; agreed to by the House on December 10, 1963 (276 - 112) and by the Senate on December 10, 1963 (passed voice vote) </Li> <Li> Signed into law by President Lyndon B. Johnson on December 17, 1963 </Li> </Ul> </Td> </Tr> <Tr> <Th_colspan="2"> Major amendments </Th> </Tr> <Tr> <Td_colspan="2"> Motor Vehicle Air Pollution Control Act of 1965 (79 Stat. 992, Pub. L. 89--272) Air Quality Act of 1967 (81 Stat. 485, Pub. L. 90--148) Clean Air Act Extension of 1970 (84 Stat. 1676, Pub. L. 91--604) Clean Air Act Amendments of 1977 (91 Stat. 685, Pub. L. 95--95) Clean Air Act Amendments of 1990 (104 Stat. 2468, Pub. L. 101--549) </Td> </Tr> <Tr> <Th_colspan="2"> United States Supreme Court cases </Th> </Tr> <Tr> <Td_colspan="2"> Union Elec . Co. v. EPA, 427 U.S. 246 (1976) Chevron USA v. Natural Resources Defense Council, 467 U.S. 837 (1984) Whitman v. American Trucking Ass'ns, Inc., 531 U.S. 457 (2001) </Td> </Tr> </Table> <Tr> <Th> Long title </Th> <Td> An Act to improve, strengthen, and accelerate programs for the prevention and abatement of air pollution . </Td> </Tr>

Who was president when the clean air act was passed