[Code of Federal Regulations]
[Title 49, Volume 5]
[Revised as of October 1, 2007]
From the U.S. Government Printing Office via GPO Access
[CITE: 49CFR390.7]

[Page 318-319]
 
                        TITLE 49--TRANSPORTATION
 
                      DEPARTMENT OF TRANSPORTATION
 
PART 390_FEDERAL MOTOR CARRIER SAFETY REGULATIONS; GENERAL--Table of 
Contents
 
             Subpart A_General Applicability and Definitions
 
Sec.  390.7  Rules of construction.

    (a) In part 325 of subchapter A and in this subchapter, unless the 
context requires otherwise:
    (1) Words imparting the singular include the plural;
    (2) Words imparting the plural include the singular;
    (3) Words imparting the present tense include the future tense.
    (b) In this subchapter the word--
    (1) Officer includes any person authorized by law to perform the 
duties of the office;
    (2) Writing includes printing and typewriting;

[[Page 319]]

    (3) Shall is used in an imperative sense;
    (4) Must is used in an imperative sense;
    (5) Should is used in a recommendatory sense;
    (6) May is used in a permissive sense; and
    (7) Includes is used as a word of inclusion, not limitation.

[53 FR 18052, May 19, 1988, as amended at 60 FR 38744, July 28, 1995]