If any vessel enters Yorkhill Basin after the date specified in accordance with paragraph (2)(b) of Article 4 (removal of vessels from Yorkhill Basin) of this Order, the harbourmaster may direct the master of such vessel forthwith to remove the vessel from Yorkhill Basin, and if the master of such vessel does not forthwith comply with such directions the provisions of paragraphs (3) to (5) inclusive of the said Article 4 shall apply to and in respect of such vessel as if such vessel had been within Yorkhill Basin before the said date.