19 CFR § 174.16
Limitation on protests after reliquidation
July 16, 2020
A protest shall not be filed against the reliquidation decision of the port director or Center director made before January 19, 2017, or the reliquidation decision of the Center director made on or after January 19, 2017, upon any question not involved in the reliquidation.
[CBP Dec. No. 16-26, 81 FR 93025, Dec. 20, 2016]