Can state government give pension as per settlement deed

Does the state government office/head of the such govt. office has any power to act accordingly as per the deed of settlement whatever written in it or the deed of settlement should only be challenged in the court for execution of such deed of settlement, it is duly signed and notarized.This deed of settlement is related to "Pension arrears" to provide maintenance to first wife, which is not done earlier and it was not contested, but a deed of settlement was written by husband, which was not fruitful yet. So, we approached, such govt. office with the same. Hence, my question.