28. Any person subject to this Act who commits any of the following offences, that is to say,-(a) being a sentry, sleeps or is intoxicated on his post or quits it without leave; or(b) being a sentry, or on guard, plunders, or wilfully destroys, or injures, any property placed under his charge or under charge of his guard; or(c) strikes, or forces or attempts to force any sentry or safeguard; or(d) without orders from his superior officer, leaves his guard, picquet, patrol or post;shall, on conviction by court martial, if he commits such offence on active service, be punished with rigorous imprisonment which may extend to fourteen years or with such less punishment as is in this Act mentioned; and if he commits such offence not on active service, be punished with rigorous imprisonment for a term which may extend to five years or with such less punishment as is in this Act mentioned.