Section 20 of the Principal Act is amended as follows:

(a) by omitting "A person" and substituting "(1) A person" ;

(b) by inserting the following subsection:

(2)  Subsection (1) is not contravened by reason only of the exhibition of a film –

(a) under a title different from that under which it is classified if it is contained on one device that consists only of 2 or more classified films; or

(b) with a modification referred to in section 21(2) of the Commonwealth Act.