47 CFR 1.776: Pricing flexibility limited grandfathering.

Special access contract-based tariffs that were in effect on or before August 1, 2017 are grandfathered. Such contract-based tariffs may not be extended, renewed or revised, except that any extension or renewal expressly provided for by the contract-based tariff may be exercised pursuant to the terms thereof. During the period between August 1, 2017 and the deadline to institute mandatory detariffing under § 61.201(b), upon mutual agreement, parties to a grandfathered contract-based tariff may replace it at any time with a new contract-based tariff or with a new or amended contract that is not filed as a contract-based tariff.