An individual’s instructor certification expires: At the conclusion of the individual’s term of certification established under Regulation .15B of this chapter for the individual’s instructor classification; When the individual leaves employment with the correctional unit, academy certified under COMAR 12.10.01.14, or the Department of Juvenile Services on behalf of which the training authority submitted the application for the individual’s instructor certification; or If the training authority for the correctional unit, academy certified under COMAR 12.10.01.14, or the Department of Juvenile Services that submitted the application for the individual’s instructor certification requests that the individual’s instructor certification be terminated. An individual’s term of certification may not expire while the individual is on inactive status.