Expressions in statutory instrument have same meaning as in enactment

Where an enactment confers power to make any statutory instrument or issue any statutory document, then unless a contrary intention appears, (a) expressions used in the statutory instrument or document have the same respective meanings as in the enactment; and (b) the expression “the Act” if used in the statutory instrument or document shall be construed as referring to the Act under which the instrument is made or the document issued, as the case may be.