Any person who being—
(a) the owner, occupier, lessee or person in charge of any building, premises, room, or place knowingly permits a meeting of persons to be held in that building, premises, room or place;
(b) the owner, charterer, lessee, operator, agent, or master of a vessel or the owner, charterer, lessee, operator, agent or pilot in charge of an aircraft knowingly permits that vessel or aircraft to be used;
(c) the owner, lessee or person in charge of any equipment or facility that allows for recording or conferencing or meetings via technology knowingly permits that equipment or facility to be used,
for the purposes of committing an offence under section 15, or planning, promoting or supporting the commission of a terrorist act, commits an offence and is, on conviction on indictment, liable to imprisonment for a term of 15 years.