Unless otherwise provided by the particular enabling legislation, administrative enforcement proceedings shall begin with a written notice of violation (NOV) being served upon the Respondent. The NOV shall set forth Respondent's action or omission and the specific provision of the Code, rules, license or permit alleged to be violated. An NOV may be a letter, inspection sheet, consent order or final order, if it meets the requirements of this Section.
Okla. Admin. Code § 252:4-9-1