Article 25 Maintenance of privileges of other ratings

A person shall not be entitled to perform the functions to which a flying instructor’s rating (gyroplanes), an assistant flying instructor’s rating (gyroplanes) or an instrument meteorological conditions rating (aeroplanes) relates unless his licence bears a valid certificate of test, which certificate shall be appropriate to the functions to which the rating relates in accordance with Section 1 of Part C of Schedule 8 to this Order and shall otherwise comply with that Part.

A person shall not be entitled to perform the functions to which an instrument rating or an instructor’s rating (other than a flying instructor’s rating (gyroplanes) or an assistant flying instructor’s rating (gyroplanes)) relates unless his licence bears a valid certificate of revalidation, which certificate shall be appropriate to the functions to which the rating relates in accordance with Section 2 of Part C of the said Schedule and shall otherwise comply with that Part.