In this Act, unless the context otherwise requires,—

• “financial year” means the period beginning with the commencement of this Act and ending with the thirty-first day of March, nineteen hundred and sixty-one, and each subsequent period of twelve months beginning with the first day of April;

• “Highlands and Islands” means the F1areas specified in the Schedule to this Act, . . . F2;

• “sea transport services” has the meaning assigned to it by section one of this Act;

• “ships” includes boats and vessels of any description for use in navigation.