Until when did Marital Law remain in force after Zulifqar Ali Bhutto took over as the Civilian Martial Law Administrator?

Until when did Marital Law remain in force after Zulifqar Ali Bhutto took over as the Civilian Martial Law Administrator?

جب تک کہ ذوالفقار علی بھٹو نے سویلین مارشل لا ایڈمنسٹریٹر کا عہدہ سنبھالنے کے بعد ازدواجی قانون کب نافذ نہیں کیا؟
Explanation

Martial Law remained in force until April 20, 1972, after Zulfikar Ali Bhutto took over as the Civilian Martial Law Administrator.

Bhutto had taken over on December 20, 1971, following the military defeat in East Pakistan, and officially lifted Martial Law in April 1972.