30.—(1) Any person who is found in possession of any salmon or trout, or any instrument, explosive, poison or other noxious substance which could be used in the taking of salmon or trout, in circumstances which afford reasonable ground for suspecting that that person has obtained possession of such salmon or trout, or such instrument, explosive, poison or substance as the result or for the purpose of committing an offence against any of the provisions of articles 22, 23, 26, 27, and 28, may be charged with unlawful possession as aforesaid of such salmon or trout, or of such instrument, explosive, poison or substance.
(2) Where the court is satisfied that a person charged under paragraph (1) obtained possession of salmon or trout, or of any instrument, explosive, poison or other noxious substance as the result or for the purpose of committing an offence against any of the provisions of articles 22, 23, 26, 27 and 28, that person may be convicted of unlawful possession as aforesaid and dealt with in like manner as if that person had been convicted of the same offence.
(3) A person who commits an offence under this article may be convicted on the evidence of one witness.