A person subject to this Act who commits an offence of murder against a person not subject to military, naval or air force law, or of culpable homicide not amounting to murder against such a person or of rape in relation to such a person, shall not be deemed to be guilty of an offence against this Act and shall not be tried by a court-martial, unless he commits any of the said offences—
1* * * * *1. The Explanation omitted by Act 13 of 1975, s. 3 (w.e.f. 25-1-1975).