Anyone can request Parliament to redress any local or state-wide grievance through petition. Although only one signature is required to present a petition, those petitions with more signatures would naturally show that there is greater public concern about the issue in question.
All petitions are presented to the Council or Assembly by a member of the House tabling it.
It is important to note that specific guidelines need to be followed to Draft a petition and make it valid for tabling. For example, all signatures must be original and written on the sheets bearing the petition.
All Guidelines can be found here.