The PRes are completely "VOLUNTARY". The only punishment for not showing up for "Parades" and training is that the person after a period of four weeks will be put on the NES list and the Release process will begin. If the person's parents keep them at home, causing them to miss training, then they fall under those conditions, personal or not.
The way this discussion is going is all speculation. No one, except the OP, knows what circumstances the OP is finding themself in. If it continues for too long, the OP will have likely moved out, got married, and raise kids who they can then sign authorization to join the PRes.
Don't confuse the fact that reserves are voluntary, meaning there are no set terms of service where duration is concerned and a reservist may "quit" any time he/she wants unless called out under the NDA (i.e. war), and parental consent to enrol. As FJAG indicated (above now that the thread has been merged), consent to enrolment is a one time thing as far as the military is concerned. There is no "continuing" consent requirement. In the present can the poster asked specifically about withdrawal
of parental consent after enrolment
. There is no such animal. However, how parents and child interact at home and as a result, the issue of wether or not the "child" should voluntarily
ask for termination of service is up to them to work out privately. One thing is sure, however: the parents cannot just show up at a reserve units and ask for their child to be "voluntary" released from the military. Only the CAF member himself/herself can do that.