4. Consumption of intoxicating Drink and Drugs.

(i) while on duty, be under the influence of intoxicating drink or drugs to such an extent as to tender him incapable of discharging his duties properly and efficiently;
(ii) habitually use intoxicating drink or drugs to excess;
(iii) appear in public place in a state of intoxication; and
(iv) consume any intoxicating drink or drug in public place.
Explanation