members of the corps were volunteers. polish personnel were able to leave the forces and leave the united kingdom or take up employment within the united kingdom without joining the corps. they signed up for two years, but could leave the corps at any time, becoming members of the corps reserve until their two years were completed. during this time they could, however, be recalled to the corps if it was deemed necessary (e.g. if they were found to be unsuitable for the job they had taken).