31. (1) In order that any instrument referred to in section 30 when completed may be enforceable against any person who became a party thereto prior to its completion, it must be filled up within a reasonable time and strictly in accordance with the authority given, but where any such instrument, after completion, is negotiated to a holder in due course, it is valid and effectual for all purposes in his hands, and he may enforce it as if it had been filled up within a reasonable time and strictly in accordance with the authority given.

(2) Reasonable time within the meaning of this section is a question of fact.

R.S., c. B-5, s. 32.