Title 是什么? the code of federal regulations (cfr) is the codification of the general and permanent rules published in the federal register by the executive departments and agencies of the federal government. it is divided into 50 titles that represent broad areas subject to federal regulation. each volume of the cfr is updated once each calendar year and is issued on a quarterly basis. titles 1-16 are updated as of january 1st, titles 17-27 are updated as of april 1st ,titles 28-41 are updated as of july 1st, titles 42-50 are updated as of october 1st ,each title is divided into chapters, which usually bear the name of the issuing agency. each chapter is further subdivided into parts that cover specific regulatory areas. large parts may be subdivided into subparts. all parts are organized in sections, and most citations in the cfr are provided at the section level. a list of agencies and where they appear in the cfr may be found in appendix c of the u.s. government manual . cfr title 40 rotection of the environment chapter i -- environmental protection agency subchapter a -- general (parts 1 - 29) subchapter b -- grants and other federal assistance (parts 30 - 49) subchapter c -- air programs (parts 50 - 97) subchapter d -- water programs (parts 100 - 149) subchapter e -- pesticide programs (parts 150 - 180) subchapter f -- radiation protection programs (parts 190 - 197) subchapter g -- noise abatement programs (parts 201 - 211) subchapter h -- ocean dumping (parts 220 - 238) subchapter i -- solid wastes (parts 239 - 282) subchapter j -- superfund, emergency planning, and community right-to-know programs (parts 300 - 374) subchapter n -- effluent guidelines and standards (parts 400 - 471) subchapter o -- sewage sludge (parts 501 - 503) subchapter q -- energy policy (parts 600 - 610) subchapter r -- toxic substances control act (parts 700 - 799) subchapter u -- air pollution controls (parts 1039 - 1068) [ ]查看更多