I was going to develop an iPhone app around the 5BX/XBX programs. Related to that (and especially because I'm a Canadian citizen), I contacted the Canadian government about receiving the rights to use the information in a commercial product. The body of the response I got back was:
"On behalf of the department of National Defence, we were advised that the Royal Canadian Air Force - 5BX Exercise Plans for Physical Fitness are not to be reproduced. These exercises programs are outdated and have been discontinued by the Canadian Forces since they could cause physical injury."