Annex to the Convention: Regulations respecting the laws and customs of war on land - Section II : Hostilities - Chapter III : Flags of truce - Regulations: Art. 33.
Art. 33. The commander to whom a parlementaire is sent is not in all cases obliged to receive him.
He may take all the necessary steps to prevent the parlementaire taking advantage of his mission to obtain information.
In case of abuse, he has the right to detain the parlementaire temporarily.