Commentary First Group of Parts – Discipline Neglect of duty and misconduct Section 20: Unfitness or misconduct through alcohol or drugs
79.Service personnel who are unfit to be entrusted with their duty or any duty which they might reasonably be expected to perform, or whose behaviour is disorderly or likely to discredit the armed forces, due to the influence of alcohol or any drug, commit an offence.
80.“Drug” is not limited to those drugs whose possession is unlawful. It means any drug. However, an accused may raise a defence that a drug has been properly taken for a medicinal purpose, or taken or administered on the orders of a superior officer (that might, for example, be the case where a drug is taken as a precaution against the effects of a possible chemical or biological attack).