10.1.1.1.—(a) This regulation prescribes requirements applicable to the operation of any civil aircraft, including aeroplane or helicopter, for— (1) The purpose of commercial air transportation operations by any air operator whose Air Operator Certificate is issued and ; (2) Controlled by a civil aviation authority other than Nigeria. (b) Part 10 does not apply to aircraft when used by military, customs, and police services, which are not used for compensation or hire.