49 CFR § 179.400-26
Approval to operate at 286,000 gross rail load (GRL)
November 18, 2020
A tank car may be loaded to a gross weight on rail of up to 286,000 pounds (129,727 kg) upon approval by the Associate Administrator for Safety, Federal Railroad Administration (FRA). See §179.13.
[85 FR 45030, July 24, 2020]