(a)provide that a specification entitling the holder of a [driving licence] [Substituted by section 6, Act 100 of 1956, for 'licence' (w.e.f. 16-2-1957).] [to drive as a paid employee or to drive a transport vehicle] [Substituted for 'to drive a transport vehicle' by Act 47 of 1978, section 5 (w.e.f. 16-1-1979).] shall be made in the [driving licence] [Substituted by section 6, Act 100 of 1956, for 'licence' (w.e.f. 16-2-1957).] only by or under the authority of the Regional Transport Authority constituted under Chapter IV,