every goods vehicle the length of which exceeds 10 metres;
(ii)
every trailer the length of which exceeds 5 metres;
(iii)
every trailer which forms part of a combination of vehicles, the overall length of which exceeds 10 metres; and
(iv)
every mobile crane the length of which exceeds 10 metres,
which is registered on or after that date; and
(b)
with effect from 1st August 2007, to —
(i)
every goods vehicle the length of which exceeds 10 metres;
(ii)
every trailer the length of which exceeds 5 metres;
(iii)
every trailer which forms part of a combination of vehicles, the overall length of which exceeds 10 metres; and
(iv)
every mobile crane the length of which exceeds 10 metres,
which is registered before 1st August 2005.
(2) Subject to paragraph (3), every vehicle to which this rule applies shall be fitted with a rear marking as in Diagram 7 or 8.
(3) Where the rear of any vehicle to which this rule applies is so constructed that it is impracticable for that vehicle to be fitted with a rear marking as in Diagram 7 or 8 without undue expense or risk of damage to the rear marking, that vehicle may instead be fitted with a rear marking as in Diagram 9.
(4) The rear marking on a vehicle to which this rule applies shall meet the following requirements:
(a)
it shall be made of red retro-reflective material which complies with —
(i)
the specifications for retro-reflective markings of Class C set out in Regulation 104 (Uniform Provisions Concerning the Approval of Retro-Reflective Markings for Heavy and Long Vehicles and their Trailers) of Addendum 103 to the Agreement; or
(ii)
such other specifications as the Registrar may approve from time to time;
(b)
it shall be legibly and permanently marked with the approval mark of the red retro-reflective material referred to in sub-paragraph (a) and shall bear the trade name or trade mark of the manufacturer of the material;
(c)
it shall be of at least the dimensions set out in Diagram 7, 8 or 9, as the case may be;
(d)
it shall be fitted at the rear of the vehicle;
(e)
its lower edge shall be at a height of not less than 250 mm above the ground, whether the vehicle is laden or unladen;
(f)
its upper edge shall be at a height of not more than —
(i)
1,500 mm above the ground; or
(ii)
where the rear of the vehicle is so constructed that it is impracticable for the upper edge to be at a height of not more than 1,500 mm above the ground, 2,100 mm above the ground,
whether the vehicle is laden or unladen;
(g)
it shall be clearly visible at all times when viewed from within a reasonable distance to the rear of the vehicle;
(h)
it shall be maintained in a clean and effective condition while the vehicle is on a road.
(5) Any owner of a vehicle to which this rule applies who fails to ensure —
(a)
that the vehicle complies with paragraph (2) or (3); or
(b)
that the rear marking on the vehicle complies with paragraph (4),