(a) wilfully and without lawful excuse does any indecent act in any place to which the public are permitted to have access, whether on payment of a charge for admission or not; or
(b) wilfully does any indecent act in any place with intent to insult or offend any person;
is guilty of a misdemeanour, and is liable to imprisonment for 2 years.
(2) The offender may be arrested without warrant.
(3) Subsection (1) does not apply to a person who does an indecent act under the authority of an adult entertainment permit.