- (a) Whenever the Postal Regulatory Commission issues a final order that modifies the Mail Classification Schedule, it shall update the Mail Classification Schedule appearing on its website at http://www.prc.gov in accordance with paragraph (b) of this section.
- (b) Modifications to the Mail Classification Schedule shall be incorporated within 6 months after the modifications take effect pursuant to the applicable final order that modifies the Mail Classification Schedule.
- (c) Modifications pending incorporation into the Mail Classification Schedule are effective immediately upon written direction from the Postal Regulatory Commission.
[81 FR 38954, June 15, 2016. Redesignated and amended at 85 FR 9615, 9660, Feb. 19, 2020; 91 FR 20077, Apr. 15, 2026]