Any person who does any act for the purpose of preventing salmon from passing through any fish pass, or taking any salmon in its passage through the same, shall be guilty of an offence, and liable on summary conviction to a fine not exceeding level 4 on the standard scale.

Any person who attempts to commit or who does any act preparatory to the commission of any offence mentioned in paragraph (1) shall be guilty of an offence, and liable to the same punishment as if that person had committed the offence mentioned.

A person who commits an offence under this article may be convicted on the evidence of one witness.