Nev. Rev. Stat. § 453.570 : PUBLIC HEALTH AND SAFETY — CONTROLLED SUBSTANCES —MISCELLANEOUS PROVISIONS — Amount of controlled substance needed to sustain conviction for prohibited offense TEXT PDF The amount of a controlled substance needed to sustain a conviction of a person for an offense prohibited by the provisions of NRS 453.011 to 453.552, inclusive, is that amount necessary for identification as a controlled substance by a witness qualified to make such identification. NRS 453.570 Added to NRS by 1971, 359; A 1973, 1218; 2001, 1064; 2003, 561 Added to NRS by 1971, 359; A 1973, 1218; 2001, 1064; 2003, 561