A second petition cannot be posted online while the first is still posted. The period during which the first petition is posted must have ended before the second petition can be submitted. A petition that is scrupulously identical has occasionally been submitted once the online posting period of the first petition has ended.
If a second MNA is interested in the contents of the petition and wants to make a contribution, on a practical level, the MNA can intervene after the petition is tabled. The MNA can ask the relevant committee to hold a deliberative meeting to decide whether to examine the petition. That is when the member can intervene in favour of the petition and let the committee know that he or she would like it to examine the petition.