23.—(1) Section 5 does not apply where any of the offences mentioned in that section were committed before the commencement of that section.
(2) Section 6 does not apply where any of the offences mentioned in that section were committed before the commencement of that section.
(3) Paragraph (b) of section 2(3) does not apply in relation to an offence mentioned in that paragraph which is committed before the commencement of that paragraph.
(4) Paragraph (b) of section 4(2) does not apply in relation to an offence mentioned in that paragraph which is committed before the commencement of that paragraph.
(5) Section 11 does not apply in relation to an offence mentioned in section 11(1)(a) which is committed before the commencement of that section.
(6) Section 12 does not apply in relation to an offence mentioned in section 12(1) which is committed before the commencement of that section.
(7) Subsection (2) of section 18 does not apply in relation to an offence which is committed before the commencement of that subsection.