The human rights commissions for several jurisdictions have published drug testing guidelines based on the rulings of the leading cases. Here are links to these guidelines:
Canadian Human Rights Commission: Policy on Alcohol and Drug Testing
Alberta Human Rights and Citizenship Commission: Information Sheet on Drug and Alcohol Dependencies in Alberta Workplaces
Manitoba Human Rights Commission: Drug and Alcohol Testing in the Workplace
Human Rights Commission Newfoundland and Labrador: Employers Guide to the Human Rights Code (see page 12 for guidelines on employment-related drug and alcohol testing)
Northwest Territories Human Rights Commission: Alcohol & Drug Testing: A Guide for Employers
Ontario Human Rights Commission: Policy on Drug and Alcohol Testing
PEI Human Rights Commission: Physical and Intellectual Disability (Including Addiction)
The Workplace and Alcohol Prevention Problem, National Institute on Alcohol Abuse and Alcoholism
Substance Use and Gambling in the Alberta Workplace, 2002, Alberta Alcohol and Drug Abuse Commission
Substance Use Policy Development Worksheet, Centre for Addiction and Mental Health
Managing Drug and Alcohol Misuse at Work, Chartered Institute of Personnel and Development (CIPD), UK