122. Period of limitation for trial .
(1)Except as provided by sub -section ( 2), no trial by
court -martial of any person subject to this Act for any offence shall be commenced after the expirat ion of
a period of three years 1[and such period shall commence, - (a)on the date of the offence; or (b)where the commission of the offence was not known to the person aggrieved by the o ffence or
to the authority com petent to initiate action, the first day on which such offence comes to the
knowledge of such person or auth ority, whichever is earlier; or (c)where it is not kno wn by whom the of fence was com mitted, the first day on which the identity
of the offender is known to the person aggrieved by the offence or to the authority competent to
initiat e action, whichever is earlier.] (2)The provisions of sub -section ( 1) shall not apply to a tri al for an offence of desertion or fraudulent
enrolment or for any of the offences mentioned in section 37. (3)In the computation of the p eriod of time mentioned in sub -section ( 1), any time spent by such
person as a prisoner of war, or in enemy territory, or in evading arrest after the commission of the offence,
shall be excluded. (4)No trial for an offence of desertion other than desertion on active service or of fraudulent
enrolment shall be commenced if the person in question, not being an officer, has subsequently to the
commission of the offence, served continuously in an exemplary manner for not less than three years with
any portion of the regular Army.