From the BBC:
Pakistani religious parties have warned of protests if they deem attempts to revise controversial laws, including those on rape, to be "un-Islamic".
Ruling coalition members have told the BBC that parliament will debate the revised legislation on Wednesday.
The bill was tabled but withdrawn this summer in the face of angry protests.
Under current legislation women alleging rape must produce four male witnesses. If they do not they can face prosecution for adultery.
The revised bill which was withdrawn would have allowed alleged rapists to be tried under civil as well as Islamic law.
The religious parties say they will mount a "nationwide campaign" against the Women's Protection Bill if it is not to their liking.