14.4. A beneficiary is exempt from paying the contribution referred to in section 14.3 to the pharmacist(a) for the remainder of a year, where the number of prescriptions and repeat prescriptions for which he is required to pay a contribution in the year reaches the number determined by regulation and he furnishes the pharmacist with a valid proof of exemption issued to him by the Board to that effect;
(b) where he receives the maximum amount of the guaranteed income supplement pursuant to the Old Age Security Act (Revised Statutes of Canada, 1985, chapter O-9) and furnishes the pharmacist with a valid proof of exemption issued to him by the Board to that effect.