39 CFR 3030.103: Implementation of rate adjustments.

(a) Except as described in paragraph (b) of this section, effective March 1, 2026, through September 30, 2030, the Postal Service may not adjust rates of general applicability for Market Dominant products using the rate authorities provided under subparts C through H of this part more than one time each fiscal year.

(b) Rate adjustment filings that only include rate decreases calculated pursuant to § 3030.244 or are de minimis rate increases compliant with § 3030.129 are not subject to paragraph (a) of this section.