Seldonis IV Convention

The Seldonis IV Convention was a treaty that governed the treatment of prisoners of war.

The Convention was negotiated in 2248 between the Federation nd the Klingon Empire in order to deal with prisoners of war. In time, every major space-faring power in the region became a signatory to the treaty. 

After a covert operation into Cardassian territory which resulted in the capture of Starfleet Captain Jean-Luc Picard, Commander William Riker attempted to envoke the Seldonis IV Convention in order to prevent his interrogation by the Cardassian Union. However, Gul Macet countered this move by stating that the Convention governed prisoners of war which meant that the covert operation was authorised by the Federation which it denied.