(3) A coupon shall be deemed to be a valid coupon for the purposes of this Act-
|
| (a) if it is attached to a valid permit; | | |
|
| (b) if the coupon has not been surrendered for the purpose of purchasing or obtaining from a retail depot, the petroleum product in respect of which the permit is issued ; and | | |
|
| (c) the period in respect of which such coupon was issued has not expired. | | |
|