1. (a) Service performance measurements obtained from internal service performance measurement systems or hybrid service performance measurement systems (which are defined as systems that rely on both an internal and an external measurement component) shall not be used to comply with any reporting requirement under subparts A or B of this part without prior Commission approval.
2. (b) The Postal Service shall file notice with the Commission describing any proposed changes to internal or hybrid service performance measurement systems (including proposed changes to any associated reporting methodologies or the use of proxies). In proposing such changes, the Postal Service must demonstrate, by a preponderance of the evidence, that internal or hybrid service performance measurement systems will be capable of producing accurate, reliable, representative, and useful service performance data and results. The Commission may summarily dismiss (without prejudice to refiling) any proposal that fails to include this information. The Postal Service's proposal must specify any planned implementation date(s), any requested decision date(s), and the reasons therefor. Preponderance of the evidence means proof by information that, compared with that opposing it, leads to the conclusion that the fact at issue is more probably true than not.
3. (c) In the absence of a determination of good cause for an extension, the Commission shall issue an order on a notice filed pursuant to paragraph (b) of this section not later than 90 days following the filing of the Postal Service's notice. If the Commission determines that an order cannot reasonably be issued within 90 days, then the Commission shall issue an order explaining why and providing an expected date for completion of Commission review.
4. (d) Changes to internal or hybrid service performance measurement systems proposed pursuant to paragraph (b) of this section may not be implemented without prior Commission approval.
5. (e) The Commission may initiate a proceeding at any time to consider whether internal or hybrid service performance measurement systems are producing accurate, reliable, representative, and useful service performance data and results. Any interested person, including a public representative, may submit a petition to the Commission to initiate such a proceeding.

[91 FR 26923, May 13, 2026]