20.—(1) Where an enactment contains a definition or other interpretation provision, the provision shall be read as being applicable except in so far as the contrary intention appears in—
(a) the enactment itself, or
(b) the Act under which the enactment is made.
(2) Where an enactment defines or otherwise interprets a word or expression, other parts of speech and grammatical forms of the word or expression have a corresponding meaning.
