11. —(1) Where a fire authority or an authorised officer is of the opinion that an indoor event in respect of which a licence is required under section 5 is taking place or is likely to take place—

(a) without a licence, or

(b) in contravention of a condition attached to or the terms of a licence,

the fire authority or an authorised officer may serve a notice of cessation on the owner or occupier of the building concerned or on any person who in the opinion of the fire authority or the authorised officer is holding, organising or is otherwise materially involved in the organisation of the indoor event.

(2) A notice of cessation may require all or any of the following—

(a) the immediate cessation of any indoor event or the discontinuation or alteration of any preparations for it,

(b) the removal of any temporary buildings, structures, plant, machinery or any other thing from the building concerned which in the opinion of the fire authority is intended for use at the indoor event, and

(c) any works to be carried out or thing done for the purpose of restoring the building concerned to the condition it was in before the commencement of preparations for the indoor event.

(3) A notice of cessation may be served on an owner or occupier of the building concerned or any other person referred to in subsection (1) in accordance with section 22 .

(4) A person who fails to comply with the requirements of a notice of cessation shall be guilty of an offence.