Military courts were created in Pakistan through 21st amendment for a period of

Military courts were created in Pakistan through 21st amendment for a period of
A: 2 years
B: 3 years
C: 4 years
D: 5 years

Military courts were introduced under the 21st constitutional amendment for a two year period after the tragic APS Peshawar attack in 2014. Their purpose was to conduct speedy trials of terrorism related cases. Although controversial they were seen as urgent response to terrorism. After two years their extension was debated in parliament.