33 CFR § 401.90 - Boarding for inspections.
(a) For the purpose of enforcing these Regulations in this part in both Canadian and U.S. waters, an officer may board any vessel and:
(1) Examine the vessel, its equipment and cargo; and
(2) Determine that the vessel is adequately manned.
(b) In addition to § 401.90(a)(1) and (2) in Canadian waters, a Manager's officer may also:
(1) Require any person appearing to be in charge of the vessel to produce for inspection, or for the purpose of making copies or extracts, any log book, document or paper; and
(2) In carrying out an inspection:
(i) Use or cause to be used any computer system or data processing system on the vessel to examine any data contained in, or available to, the system;
(ii) Reproduce any record, or cause it to be reproduced from the data, in the form of a print-out or other intelligible output and remove the print-out or other output for examination or copying; and
(iii) Use or cause to be used any copying equipment in the vessel to make copies of any books, records, electronic data or other documents.
(c) In Canadian waters, the owner or person who is in possession or control of a vessel that is inspected, and every person who is found on the vessel, shall:
(1) Give the officer all reasonable assistance to enable the officer to carry out the inspection and exercise any power conferred by the Canada Marine Act; and
(2) Provide the officer with any information relevant to the administration of these practices and procedures that the officer may reasonably require.
(d) Vessels shall provide a safe and approved means of boarding. Pigeon holes are not accepted as a means of boarding and an alternate safe means of access shall be provided.