Hi Dean
This is what I have in my contract of employment
44. Drug and Alcohol use
44.1 It is the intention of Pure HYDRO Cleaners to provide a drug-free, healthy and safe workplace. To promote this goal, you are required to report to work in the appropriate mental and physical condition to perform your job in a satisfactory manner. While on Company business or travelling to and from client/customers premises you may not use, possess, distribute, sell or be under the influence of alcohol or illegal drugs.
44.2 The legal use of prescribed drugs is permitted on the job, only if it does not impair your ability to perform the essential functions of the job effectively and in a safe manner that does not endanger either yourself or other individuals in the workplace.
44.3 Violations of this statement may lead to disciplinary action, up to and including termination of employment, and/or required participation in a substance abuse rehabilitation or treatment programme, especially where help is refused and/or impaired performance continues.
44.4 Possession of and dealing with illegal substances will be immediately reported to the police in all cases