NRS 139.110: Right of contest: Filing of counterpetition; notice and hearing.

An interested person may contest the petition by filing a written opposition on the ground that the petitioner is not qualified or may assert the contestant’s own right to appointment and request that letters be issued to the contestant or nominee. In the latter case, the contestant or nominee must file a petition and give the notice required for the original petition, and the court must hear the competing petitions together.