Nev. Rev. Stat. § 125A.305
1. Except as otherwise provided in NRS 125A.335, a court of this State has jurisdiction to make an initial child custody determination only if:
(b) A court of another state does not have jurisdiction pursuant to paragraph (a) or a court of the home state of the child has declined to exercise jurisdiction on the ground that this State is the more appropriate forum pursuant to NRS 125A.365 or 125A.375 and:
(Added to NRS by 2003, 994)