(1)Where an act or omission is an offence under an Assembly Act or Welsh subordinate instrument (“A”) and is also an offence—
(a)under an Assembly Act or Welsh subordinate instrument other than A,
(b)at common law, or
(c)under an Assembly Act or Welsh subordinate instrument other than A and at common law,
a person is liable to be prosecuted and punished under either or any of those Acts or instruments or at common law, but cannot be punished more than once for the same offence.
(2)Subsection (1) does not apply if the act or omission is also an offence under any legislation to which section 18 of the Interpretation Act 1978 (c. 30) applies (but that section makes corresponding provision in relation to such an act or omission).