MOTOR VEHICLE ACT GOVERNMENT OF INDIA has defined auto dipper as essential safety device in Central Motor Vehicle Act & Rules as reproduced below :
Central Motor Vehicle Act,1989 Section 110
The Central Government may make rules regulating the construction, equipment and maintenance of motor vehicles and trailers with respect to all or any of the following matters, namely:

(a), (b), (c), (d), (e), (f), (g), (h), (i), (j) safety belts, handle bars of motor cycles, auto dippers and other equipments essential for safety of drivers, passengers and other road users.
Central Motor Vehicle Rule 106
(1) No lamp showing a light to the front shall be used on any motor vehicle including construction equipment vehicle whether fitted with single or dual head lamp) unless such lamp is so constructed, fitted and maintained that the beam of light emitted there from

(a) is permanently deflected downwards to such an extent that it is not capable of dazzling any person whose eye position is,-
(A) at a distance of 8 metres from the front of lamp,
(B) at a distance of 0.5 metre to the right side of the lamps, i.e., fitted at right extreme of the vehicle, from the right edge of the lamp, and
(C) at a height of 1.5 metres from the supporting plane of the vehicle:
Provided that in the case of agricultural tractors fitment and construction of lamps shall be as per the Indian Standards IS:12239(Part2: 1988)

(a) Is capable of being deflected downwards by the driver in such manner as to render it incapable of dazzling any such person in the circumstances aforesaid;
(b) Is capable of being extinguished by the operation of a device which at the same time causes a beam of light to be emitted from the lamp which complies with the provision of clause (a).
(c) Is capable of being extinguished by the operation of a device which at the same time either deflects the beam of light from another lamp downwards or both downwards and to the left in such manner as to render it incapable of dazzling any person in the circumstances aforesaid, or brings into or leaves in operation a lamp which complies with the provisions of clause (a).

Rule 6 of Road Regulations Rule 1989

In exercise of the powers conferred by section 118 of the Motor Vehicles Act, 1988 (59 of 1988), the Central Government hereby makes the following regulations for the driving of motor vehicles, namely

1. Short title and commencement
(a) These regulations may be called THE RULES OF THE ROAD REGULATIONS, 1989.
(b) They shall come into force on the first day of July, 1989.

2. Keep left..............

3. Turning to left and right..............

4. Passing to the right............

5. Passing to the left...............

6. Overtaking Prohibited in certain cases – The driver of a motor vehicle shall not pass a vehicle travelling in the same direction as himself,--
(a) If his passing is likely to cause inconvenience or danger to other traffic proceeding in any direction;
(b) If he is near a point, a bend or corner or a hill or other obstruction of any kind that renders the road ahead not clearly visible;
(c) If he knows that the driver who is following him has begun to overtake him;
(d) If the driver ahead of him has not signaled that he may be overtaken.

7. Overtaking not to be obstructed
The driver of a motor vehicle shall not, when being overtaken or being passed by another vehicle, increase speed or do anything in any way to prevent the other vehicle from passing him.