Sec.  1.427   Effective date of rules.

   (a) Any rule issued by the Commission will be made effective not less than
   30 days from the time it is published in the Federal Register except as
   otherwise specified in paragraphs (b) and (c) of this section.

   (b) For good cause found and published with the rule, any rule issued by the
   Commission may be made effective within less than 30 days from the time it
   is published in the Federal Register. Rules involving any military, naval or
   foreign affairs function of the United States; matters relating to agency
   management or personnel, public property, loans, grants, benefits or
   contracts; rules granting or recognizing exemption or relieving restriction;
   rules of organization, procedure or practice; or interpretative rules; and
   statements of policy may be made effective without regard to the 30-day
   requirement.

   (c) In cases of alterations by the Commission in the required manner or form
   of keeping accounts by carriers, notice will be served upon affected
   carriers not less than 6 months prior to the effective date of such
   alterations.