(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) Modification to the Mail Classification Schedule shall be incorporated within 3 months of the issue date of the final order.

(c) Modifications pending incorporation into the Mail Classification Schedule are effective immediately upon written direction from the Postal Regulatory Commission.