Section 11

If any person knowingly harbours any person whom he knows, or has reasonable grounds for supposing, to be a person who is about to commit or who has committed an offence under this Act, or knowingly permits to meet or assemble in any premises in his occupation or under his control any such persons, or if any person having harboured any such person, or permitted to meet or assemble in any premises in his occupation or under his control any such persons, wilfully omits or refuses to disclose to a police officer any information which it is in his power to give in relation to any such person, he shall be guilty of an offence.

In this section, “harbour” includes supplying a person with shelter, food, drink, money, clothes, arms, ammunition or means of conveyance, or assisting a person in any way to commit an offence.