Right from the 2013/2014 SEM Guide.....
3.1.09 Academic Awards - Scholarships/Bursaries (CFAO 9-12). Members cannot receive scholarships, bursaries or financial assistance where, by the terms of the prize, the money is to be used for any payment that normally is paid or reimbursed by the CAF, unless the award is applied directly against those costs and the member does not claim reimbursement.
3.1.10 Prior to accepting any prize, contact the SEM for a ruling. Students may be eligible to receive academic awards not related to tuition, textbooks and mandatory equipment.
3.1.11 Non-Military Remuneration. Members of the CAF, while receiving pay and allowances, may NOT accept any bonus, gratuity or other payment regarding the performance of duties including co-op work terms. If you do so, you are liable to have a deduction from your pay and allowances equal to the amount of any such payment. Payments for such things such as fees for residency, work experience, etc MAY NOT be accepted. Before acceptance of positions such as teaching assistants, lab assistants and any civilian employment members are to seek approval from their CO.
3.1.12 Members are required to return any 'Opt-out' credits to their ULO that their learning institution applies to their school account (usually appears on the account in Jan/Feb). The ULO will need to return this credit to the applicable Fin Code or deduct it from any further claims the member submits.