6.  In Schedule 3—

(a) in Part 1—

(i) for paragraph 1(b) substitute the following—

“(b) the said lamps are clean and in good working order and the said reflectors are unobscured and in good condition, and”;

(ii) in paragraph 2, for sub-paragraph (1) substitute the following sub-paragraph:—

“(1) Where the vehicle is one which the lighting requirements require to be equipped with a headlamp, the vehicle shall be examined in order to determine whether every main-beam headlamp is constructed so that the light emitted from it—

(a) can be deflected at the will of the driver to become a dipped beam, or

(b) can be extinguished by the operation of a device which at the same time either—

(i) causes the lamp to emit a dipped beam, or

(ii) causes another lamp to emit a dipped beam;”; and

(iii) in paragraph 2, in sub-paragraph (2), omit the words “which would be emitted from that lamp if it were to be used to show a light to the front in the circumstances specified in sub-paragraph (2)”;

(b) in Part II, in paragraph 3(b), for the word “efficient” substitute the words “in good working order”; and

(c) in Part III, in paragraph 4(b), for the word “efficient” substitute the words “in good working order”.