(1) No pilot shall operate an aircraft at altitudes below—
(a) altitudes, established by the owner or operator, which provide the required terrain clearance, taking into account the operating limitations referred to in Subpart 8; and
(b) the minimum altitudes referred to in Subpart 6; except when necessary for take-off and landing.
(2) The method of establishing minimum flight altitudes referred to in subregulation (1) (a) is prescribed in Document SA-CATS 91.
(3) Where the minimum flight altitudes established by the appropriate authority of a foreign State are higher than the minimum flight altitudes prescribed in this regulation, the minimum flight altitudes established by such appropriate authority shall apply in respect of a South African registered aircraft flying in the airspace of the foreign State concerned.