[Code of Federal Regulations]

[Title 49, Volume 2]

[Revised as of October 1, 2005]

From the U.S. Government Printing Office via GPO Access

[CITE: 49CFR171.9]



[Page 102]

 

                        TITLE 49--TRANSPORTATION

 

   CHAPTER I--PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, 

                      DEPARTMENT OF TRANSPORTATION

 

PART 171_GENERAL INFORMATION, REGULATIONS, AND DEFINITIONS--Table 

of Contents

 

Sec. 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]