Règle correspondante
Canada
Practice Relating to Rule 68. Precautions while Receiving Parlementaires
Section A. General
Canada’s LOAC Manual (1999) notes:
The belligerent to whom a parlementaire is proceeding may take all steps necessary to protect the safety of the belligerent’s position, and prevent the parlementaire from taking advantage of the visit to secure information. The adverse party may therefore prescribe the route to be taken by the parlementaire, employ blindfolds, limit the size of the party, or take similar action. 
Canada, The Law of Armed Conflict at the Operational and Tactical Level, Office of the Judge Advocate General, 1999, p. 14-1, § 7.
Canada’s LOAC Manual (2001) states in its chapter entitled “Communications and contact between opposing forces”:
The belligerent to whom a parlementaire is proceeding may take all steps necessary to protect the safety of the belligerent’s position, and prevent the parlementaire from taking advantage of the visit to secure information. The adverse party may therefore prescribe the route to be taken by the parlementaire, employ blindfolds, limit the size of the party, or take similar action. A parlementaire may proceed on foot, by vehicle, or otherwise, as agreed with the adverse party. 
Canada, The Law of Armed Conflict at the Operational and Tactical Levels, Office of the Judge Advocate General, 13 August 2001, § 1402.5.