designate

... When prisoners of war do not benefit or cease to benefit, no matter for what reason, by the activities of a Protecting Power or of an organization provided for in the first paragraph above, the Detaining Power shall request a neutral State, or such an organization, to undertake the functions performed under the present Convention by a Protecting Power designated by the Parties to a conflict. ...

... Besides those who are designated by the medical authorities of the Detaining Power, wounded or sick prisoners of war belonging to the categories listed below shall be entitled to present themselves for examination by the Mixed Medical Commissions provided for in the foregoing Article: ...

... Prisoners of war detained in connection with a judicial prosecution or conviction and who are designated for repatriation or accommodation in a neutral country, may benefit by such measures before the end of the proceedings or the completion of the punishment, if the Detaining Power consents. ...