A person who—
is guilty of an offence if he is not such a person.
In proceedings for an offence under this section it is a defence for the accused to show that he took all reasonable precautions and exercised all due diligence to avoid committing the offence.
A person guilty of an offence under this section is liable on summary conviction to imprisonment for a term not exceeding six months or a fine not exceeding level 5 on the standard scale, or both.
But where the conduct constituting the offence involved or included the public display of any material, the maximum fine for the offence is level 5 on the standard scale multiplied by the number of days for which the display continued.