Detachments are starting to get dwindling stocks, and less are being replaced. As well, Sea Cadet corps seem to be the only one's that hold a numerous amount of DP and other rifles. We have to provide our DP rifles to the air and army cadets for Remembrance, as the only .22's they have are the one's used for non-air rifle zone competitions. I believe part of the problem is that the Air and Army cadets parade out of the P Res barracks and don't have a lot of space to share, whereas we have our own building and do.
What the actual standard is, I don't know, but that's how it's handled in our neck of the woods.