Khula is by default her right but that is subjected to an agreement by the husband. Islamically, right to divorce can be added in the Nikah nama.
Following 2 lines are part of Pakistani Nikah Nama
18. Whether the husband has delegated the power of divorce to the wife. If so, under what conditions: ___________________
*19. Whether the husband's right of divorce is in any way curtailed:_________
*