S-13.1, r. 6 - By-law respecting the Mini Loto, any instant lottery and any “pool” type lottery

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7. Invalid tickets: The following are not valid:
(1)  any ticket that was not sold by the company or that was bought back by it;
(2)  any ticket on which the box marked “NUL SI DÉCOUVERT”, “DO NOT REMOVE” or any other inscription to the same effect is uncovered so that all or part of the validation number hidden under the inscription can be seen; and
(3)  any ticket that is illegible, mutilated, changed, counterfeited, inproperly, cut, poorly, incompletely or erroneously printed or otherwise defective, except if the company can determine by means of a validation number that the ticket is really the winning ticket for the prize claimed.
Decision 81-12-02, s. 7.