49 CFR 171.9 - Rules of construction.

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There are 6 Updates appearing in the Federal Register for 49 CFR 171. View below or at eCFR (GPOAccess)
§ 171.9 Rules of construction.
(a) In this subchapter, unless the context requires otherwise:
(1) Words imparting the singular include the plural;
(2) Words imparting the plural include the singular; and
(3) Words imparting the masculine gender include the feminine;
(b) In this subchapter, the word: (1) “Shall” is used in an imperative sense;
(2) “Must” is used in an imperative sense;
(3) “Should” is used in a recommendatory sense;
(4) “May” is used in a permissive sense to state authority or permission to do the act described, and the words “no person may * * *” or “a person may not * * *” means that no person is required, authorized, or permitted to do the act described; and
(5) “Includes” is used as a word of inclusion not limitation.
[Amdt. 171-32, 41 FR 15996, Apr. 15, 1976, as amended by Amdt. 171-32A, 41 FR 40630, Sept. 20, 1976; Amdt. 171-121, 58 FR 51528, Oct. 1, 1993; 75 FR 60338, Sept. 30, 2010]

Title 49 published on 2013-10-01

The following are only the Rules published in the Federal Register after the published date of Title 49.

For a complete list of all Rules, Proposed Rules, and Notices view the Rulemaking tab.

  • 2014-09-16; vol. 79 # 179 - Tuesday, September 16, 2014
    1. 79 FR 55403 - Hazardous Materials: Emergency Restriction/Prohibition Order
      GPO FDSys XML | Text
      DEPARTMENT OF TRANSPORTATION, Federal Motor Carrier Safety Administration
      Emergency Restriction/Prohibition Order.
      The Emergency Restriction/Prohibition Order became effective on August 14, 2014.
      49 CFR Part 109

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United States Code
Public Laws

Title 49 published on 2013-10-01

The following are ALL rules, proposed rules, and notices (chronologically) published in the Federal Register relating to 49 CFR 171 after this date.

  • 2014-09-25; vol. 79 # 186 - Thursday, September 25, 2014
    1. 79 FR 57494 - Hazardous Materials: Reverse Logistics (RRR).
      GPO FDSys XML | Text
      DEPARTMENT OF TRANSPORTATION, Pipeline and Hazardous Materials Safety Administration
      Notice of proposed rulemaking. Extension of comment period.
      The comment period for the NPRM published August 11, 2014, at 79 FR 46748, is extended from October 10, 2014, until November 10, 2014. To the extent possible, PHMSA will consider late-filed comments.
      49 CFR Parts 171 and 173