Driving by a drunken person or under the influence of drugs

Section 185 of the Motor Vehicles Act, 1988

Whoever, while driving, or attempting to drive, a motor vehicle: -

(a)    has, in his blood, alcohol exceeding of 30 mg. per 100 ml of blood detected in a test by a breath analyzer;  or

(b)   is under the influence of a drug to such an extend as to be incapable of exercising proper control over the vehicle

shall be punishable for the first offense with imprisonment for a term which may extend to six months, or with fine which may extend to two thousand rupees, or with both, and for a second or subsequent offense, if committed within three years of commission of the previous similar offense, with imprisonment for a term which may extend to two years, or with fine which may extend to three thousand rupees or with both.

Explanation:- For the purpose of this section, the drug of drugs specified by the Central  Government in this behalf, by notification in the Official Gazette, shall be deemed to render a person incapable of exercising  proper control over a motor vehicle.