Validity of entry and re-entry permits
7.—(1)  An entry permit shall be valid for a single entry into Singapore and shall cease to be valid if the holder of the permit being out of Singapore on the date of issue thereof has not entered Singapore within 6 months after that date:
Provided that the Controller may extend such period by a further period or periods not exceeding in the aggregate 6 months.
(2)  A re-entry permit shall be valid for such period not exceeding one year from the date of issue thereof as may be specified in the permit and if so endorsed thereon by the Controller, for any number of re-entries during the period of its validity, and, if not so endorsed, for one re-entry only:
Provided that the Controller may issue a re-entry permit for any period exceeding one year or extend the validity of any re-entry permit for such period or periods as he may think fit.