At 9:00 a.m. on Friday, March 6, 2026, a brokerage discovers that an attacker copied files containing several clients' importer numbers. By when must it notify the CBP Security Operations Center electronically?
19 CFR 111.21(b) requires a broker to notify the CBP Security Operations Center electronically (cbpsoc@cbp.dhs.gov) within 72 hours of discovering a breach of electronic or physical records relating to its customs business, including any known compromised importer identification numbers. Seventy-two hours from 9:00 a.m. Friday is 9:00 a.m. Monday; the clock does not stop for the weekend. March 23 is the separate deadline for the updated list, ten business days after the notification. Source: 19 CFR 111.21(b) (eCFR, as at 7 Oct 2026).
Counting 72 hours as three business days.
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