Not according to Hoyle or the Hague

The Iranian captors of our ally's 15 sailors and marines don't seem to care about abiding by any international norms. If they want to be perceived as a serious nation, even regional power, they need to grow up a bit.

I haven't gone article by article through this, but I found that they haven't understood Art 71:

Immediately upon capture, or not more than one week after arrival at a camp, even if it is a transit camp...every prisoner of war shall be enabled to write direct to his family...informing his relatives of his capture, address and state of health.

And I wouldn't hold my breath about compliance with Art 34:

Prisoners of war shall enjoy complete latitude in the exercise of their religious duties, including attendance at the service of their faith, on condition that they comply with the disciplinary routine prescribed by the military authorities.

Adequate premises shall be provided where religious services may be held.