11.
(1) From and after the date of coming into operation of this Part of this Act, where the aggregate of-
| | (a) the quantity of petrol in stock at a retail depot on any date (in this subsection referred to the " relevant date ") ; and | | |
| | (b) the quantity of petrol represented by such of the coupons issued by the Authority as have been surrendered at that depot between the date on which the stocks of petrol at that depot were last . ascertained by the Authority and the relevant date, | | |
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(2) From and after the date of coming into operation of this Part of this Act, where the aggregate of-
| | (a) the quantity of petrol in stock at a retail depot on any date (in this subsection referred to the "relevant date") ; and | | |
| | (b) the quantity of petrol represented by such of the coupons issued by the Authority as have been surrendered at that depot between the date on which the stocks of petrol at that depot were last ascertained by the Authority and the relevant date, | | |
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