If the Commissioner decides to deny or withdraw the approval of the instructor, the denial or withdrawal of approval of the instructor becomes effective upon the mailing of the Commissioner's decision to the provider of the approved course taught or proposed to be taught by the instructor by certified mail, return receipt requested, to the provider's last known business address.
Nev. Admin. Code § 645A.140
NRS 645A.021, 645A.039, 645A.050