2.—(1) Part II applies to any person to whom Part III or IV applies.
(2) Part III applies to a person who holds—
(a)a licence issued as a provisional licence; and
(b)a test certificate.
(3) Part IV applies to a person who falls within sub-paragraph (4) or (5).
(4) A person falls within this sub-paragraph if—
(a)he holds a licence issued as a full licence in relation to a class or certain classes of vehicles;
(b)he is treated under Article 14(2) of the Order of 1981 as authorised by a provisional licence to drive another class or other classes of vehicles; and
(c)he holds a test certificate which relates to that other class of vehicles or any of those other classes of vehicles.
(5) A person falls within this sub-paragraph if he holds—
(a)a licence issued as a full licence in relation to a class or certain classes of vehicles and as a provisional licence in relation to another class or other classes of vehicles; and
(b)a test certificate which relates to that other class of vehicles or any of those other classes of vehicles.