S.29C of the Firearms Act (1977) states that a person who has a firearm in their immediate control must carry their licence with them at all times. S.29C does not relate to firearms registration certificates. The section in full is copied below.

29C-Duty to carry licence

(1) A person who is carrying a firearm on or about his or her person or who has a firearm in his or her immediate physical control must carry with him or her a firearms licence authorising his or her possession of the firearm.

Maximum penalty: $5 000.

S.31 of the Firearms Act states that a person who has possession of a firearm (this includes at home - in a locked safe etc.) must produce upon request their licence and / or registration certificate - however if they cannot, have 48 hours in which to produce at a police station nominated by the person. The section is copied below for you.

31-Production of licence and certificate of registration

(1) A person who has possession of a firearm must, at the request of a police officer or a warden under the National Parks and Wildlife Act 1972-

(a) produce a firearms licence authorising his or her possession of the firearm and the certificate of registration of the firearm for inspection by the police officer or warden (or, if production of the licence or certificate is not possible at the time of the request, that person must produce the licence or certificate within 48 hours for inspection by a police officer at a police station nominated by that person at the time of the request); and

(b) produce the firearm for inspection or, if production is not possible at the time of the request, produce the firearm within 48 hours for inspection by a police officer at a police station nominated by that person at the time of the request.

Maximum penalty: $5 000.

Therefore - when competing, (in physical control of a firearm) must carry and produce upon demand their licence, no requirement to carry registration certificate.

If at any other time (eg when being inspected at home etc) if they haven't got the licence or certificate of registration, have 48 hours in which to take to a Police Station.