An operator whose certification has been expired for twenty-four (24) months or less shall be eligible to receive a new waterworks operator certification at a level no higher than the certification previously issued by the Bureau if he/she successfully passes the written examination required by the Bureau expired more than twenty-four (24) months must successfully pass the written examination required by the Bureau and comply fully with the provisions of Rule 2.4.1.
15 Miss. Code. R. 20-72-2.4.3