19 CFR § 132.3
Observation of official hours
July 16, 2020
An entry summary for consumption or a withdrawal for consumption for quota-class merchandise shall be presented only during official office hours, except as provided in §§132.12 and 141.62(b) of this chapter. For purposes of administering quotas, “official office hours” shall mean 8:30 a.m. to 4:30 p.m. in all time zones.
[T.D. 79-221, 44 FR 46814, Aug. 9, 1979]