Nev. Rev. Stat. § 435.123
Whenever a person is alleged to be a person with an intellectual disability or a person with a developmental disability and is alleged to be a clear and present danger to himself or herself or others, the person's parent or guardian or another responsible person may initiate proceedings for his or her involuntary admission to an intellectual and developmental disability center by petitioning the district court of the county where the person resides. The petition must be accompanied by a certificate signed by a physician or licensed psychologist experienced in the diagnosis of intellectual disabilities or developmental disabilities, stating that he or she has examined the person within the preceding 30 days and has concluded that the person is a person with an intellectual disability or a person with a developmental disability, has demonstrated that the person is a clear and present danger to himself or herself or to others and is in need of institutional training and treatment.
NRS 435.123