Powers on withdrawal
(2) A preclearance officer may, for the purpose of maintaining the security of or control over the border between Canada and the United States, exercise the following powers in a preclearance area or preclearance perimeter with respect to a traveller who is withdrawing from preclearance:

(a) direct the traveller to identify themselves and to produce identification that contains their photograph and that is issued by the federal government, a provincial or local government or a foreign government;

(b) question the traveller for the purposes of identifying them or determining their reason for withdrawing;

(c) record and retain information obtained from the traveller under paragraph (a) or (b), including by making a copy of the traveller’s identification;

(d) take and retain a photograph of the traveller, if the traveller has not produced identification that contains their photograph and allows their identity to be verified;

(e) visually examine a conveyance used by the traveller and, if the conveyance transports goods on a commercial basis, open its cargo compartments to visually examine the contents;

(f) examine, using means or devices that are minimally intrusive, a conveyance used by the traveller, without opening or entering it, if the preclearance officer has reasonable grounds to suspect that the traveller could compromise the security of or control over the border.

Limitation
(3) A preclearance officer may exercise the powers set out in subsection (2) only to the extent that doing so would not unreasonably delay the traveller’s withdrawal.