In other industries the international industry body has a standard for management to apply.
http://www.ogp.org.uk/pubs/445.pdf
Time for IATA to act to restore public confidence?
SM, your referenced document also includes:
Analgesics (paracetamol, iboprofen)
Anthistamines
Codeine
Cough Medicines
Nicotine
As well as hydrocarbons, petrol/gasoline/solvents etc. it would be interesting to see MRO engineers getting busted for substance abuse due to exposure to such substances.