10.—(1) A person may, without holding a firearm certificate, borrow a rifle from the occupier of private premises and use it on those premises in the presence of the occupier or an employee of the occupier if—
(a)the occupier or employee in whose presence the rifle is used holds a firearm certificate for it; and
(b)the borrower’s possession and use of it complies with any conditions as to those matters in the certificate.
(2) A person who by virtue of sub-paragraph (1) is entitled without holding a firearm certificate to borrow and use a rifle in another person’s presence may also, without holding a firearm certificate, purchase or acquire ammunition for use in the rifle and have it in his possession during the period for which the rifle is borrowed if—
(a)the firearm certificate held by that other person authorises the holder to have in his possession at that time ammunition for the rifle of a quantity not less than that purchased or acquired by, and in the possession of, the borrower; and
(b)the borrower’s possession and use of the ammunition complies with any conditions as to those matters in the certificate.
(3) Sub-paragraphs (1) and (2) do not apply in relation to a person who is under the age of 18.