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F3Proceedings for a summary offence under this Part may be brought within a period of six months from the date on which evidence sufficient in the opinion of the prosecutor to warrant the proceedings came to his knowledge; but no such proceedings shall be brought by virtue of this section more than two years after the commission of the offence.

For the purpose of this section a certificate signed by or on behalf of the prosecutor and stating the date on which 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 so signed shall be deemed to be so signed unless the contrary is proved.

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Summary proceedings for an offence F5under this Part may be brought within a period of six months from the date on which evidence sufficient in the opinion of the prosecutor to warrant the proceedings came to his knowledge; but no such proceedings shall be brought by virtue of this section more than F6three years after the commission of the offence F7or, in the case of a continuous contravention, after the last date on which the offence was committed.

For the purpose of this section a certificate signed by or on behalf of the prosecutor and stating the date on which 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 so signed shall be deemed to be so signed unless the contrary is proved.