I do not know the answer on the fixed-wing minimum speed. It would really be an issue the chief of the air staff or the air force would be able to answer in terms of safety issues with regard to exiting the aircraft, I'm assuming. There are probably issues related to best speed for visual search and best speeds for SAR techs jumping out of aircraft. I'm not an expert. The air force would probably have to take that one on.
On February 8th, 2007. See this statement in context.