If a product that is subject to certification pursuant to NAC 445A.65825 in accordance with Standard 61, as adopted by reference in NAC 445A.6663, in order to be determined to be compatible with drinking water is not available or if an engineer believes that such a product is not the best choice for a particular design, the engineer may submit a request to the Division or the appropriate district board of health to use a product that is not certified in accordance with Standard 61. The engineer must demonstrate in such request that:
Nev. Admin. Code § 445A.66632