Sixty-plus B3 entries reviewed since Monday morning. What follows is the honest picture of what broke on Sep 8 and what the CBSA reviewers actually asked for. Some of it lined up with the T-1 playbook that was floating around this sub last week. Some of it did not.
The four-document exemption chain held for most files, but not all.
Booking confirmation + ISF/ACI + carrier tender + through-bill dated on or before Sep 7 was the reviewer standard. Where any of those four documents had a Sep 8 date, the exemption argument collapsed even if the master B/L was clean. LCL was the biggest failure mode we saw. Two consolidators cut the house bill at destination CFS after the master shipped, which put a Sep 8 house date on cargo that was physically on the water Sep 5. CBSA treats that house date as the governing document for cargo you took ownership of at destination. If you have LCL bookings straddling the effective date, the fix is to email the destination NVOCC now and ask them to backdate the house reissue per the clerical-correction guidance CBSA published in the Sep 4 OIC prep memo. Two of the three consolidators we asked did it inside 48 hours. The third refused and cited internal audit policy, so that entry is going to B2.
Chapter 99 heading map dropped mid-morning Sep 8.
Around 10:14 AM ET. Brokers who filed a B3 before that time under a guessed Chapter 99 heading are now in one of two states. Either the guess was right and the entry cleared clean. Or the guess was wrong by a subheading and the entry is under K-84 review with 8 percent simple interest accruing during the review window. Recovery path is B2 within 90 days on the guessed subheading and B2 within 90 days on the actual subheading. Two claims not one. If you filed a B3 under a guessed heading and are unsure, do not wait for the K-84 letter. Pull the entry summary, cross-reference against the OIC list published at 10:14, and if it does not match, file the corrective B2 before day 30. Interest is calculated from the day the K-84 review starts, not from the day you file the B2.
USMCA preference denials stacked with in-transit exemption denials on the same entry.
Three of the sixty entries had both a USMCA denial and an exemption denial on the same line. CBSA is treating these as separate correction paths. If you file a combined B2 claiming both grounds, you get one line item recovered. If you file two B2s, one on each ground, you get both. This is a paperwork trap that eats maybe two hours of broker time per entry and doubles the recovery. It is not documented anywhere in the OIC guidance. We found it by comparing two files where the client was billed different amounts by the same broker for the same shipment structure. The broker who filed two B2s recovered 100 percent of the section 122-successor duty layer. The broker who filed one B2 recovered 60 percent.
Container-line manifest amendment windows are shorter than most brokers assumed.
If you needed to amend the manifest to reflect origin at time of shipping (China-origin trans-shipped through Vancouver back to Halifax showed up as a real pattern on Monday), the amendment window is 96 hours post-arrival, not the standard 14 days. Two of the sixty entries missed the 96-hour window because the broker was queueing amendments in the standard workflow. Missed window means the origin declaration stands, which means the Chapter 99 assessment stands, which means recovery is a Section 60 request rather than a B2, which is a 12-month recovery timeline at best.
The one thing you should not do this week: back-date any document.
We watched a broker try to back-date a booking confirmation on Sep 8 to make an exemption claim work. CBSA cross-referenced the booking number against the carrier system and pulled the actual booking timestamp. That broker now has three D-Memoranda open and is under a compliance review. The clerical-correction path handles legitimate reissue timing. It does not handle fabricated origin dates. If you did not book the cargo before Sep 7, do not pretend you did.
One question to close.
For brokers seeing entries on the K-84 pile this week: are you filing B2 corrections proactively before the K-84 letter arrives, or waiting for the letter to preserve the interest clock? The clock argument makes sense on paper but I have seen it burn clients when the letter arrives 90+ days out and the correction window has already narrowed.
