11.—(1) A person shall not knowingly harbour any person whom he knows or has reasonable grounds for supposing to have contravened or to be about to contravene section 9.

(2) A person who becomes aware that there has been or is about to be a contravention of section 9 shall forthwith disclose to a member of the Garda Síochána or of the Defence Forces any information in relation thereto which it is in his power to give.