29Institution and conduct of proceedings in Scotland
(1)Subject to the provisions of this section, summary proceedings for an offence under this Act except under section 26(1) or (2) thereof may be instituted in Scotland by the Secretary of State.
(2)Notwithstanding the provisions of any enactment, the Secretary of State may institute proceedings by virtue of subsection (1) above in any court of summary jurisdiction in Scotland.
(3)Any proceedings in any court in Scotland, other than the High Court of Justiciary or the Court of Session, by or against the Secretary of State under this Act may be conducted on behalf of the Secretary of State by any person authorised by him for the purposes of this subsection.
(4)Summary proceedings in Scotland in respect of an offence under section 8, 11(2), 16(7), 18(4) or 26(1) or (2) of this Act or under regulations made in pursuance of this Act shall not be commenced more than three years after the commission of the offence, but subject to the foregoing limitation and notwithstanding anything in section 23 of the [1954 c. 48.] Summary Jurisdiction (Scotland) Act 1954 (limitation of time for proceedings in statutory offences) any such proceedings may be commenced—
(a)in the case of proceedings instituted by the procurator fiscal as a result of information supplied to him by the Secretary of State, at any time within six months from the date on which such information came to the knowledge of the Secretary of State ;
(b)in any other case, at any time within six months from the date on which evidence sufficient in the opinion of the person instituting the proceedings to justify proceedings came to his knowledge,
and subsection (2) of the said section 23 shall apply for the purposes of this subsection as it applies for the purposes of that section.
(5)For the purposes of subsection (4) above a certificate signed—
(a)in the case of any such proceedings as are mentioned in paragraph (a) of that subsection, by or on behalf of the Secretary of State;
(b)in any other case, by or on behalf of the person instituting the proceedings,
and stating the date on which such information or, as the case may be, such evidence as aforesaid came to his knowledge shall be conclusive evidence of that fact; and a certificate stating that matter and purporting to be signed by or on behalf of the Secretary of State or that person shall be deemed to be so signed unless the contrary is proved.