At the time an applicant is approved for registration by the Council, the applicant is assigned a registration number. The number for Sanitarian In Training or Environmental Specialist-In-Training is preceded by the letters "S.I.T." or "E.S.I.T". The applicant shall be advised of this registration number in the notice sent to the applicant by the Department. A registration number which has once been issued to a registrant shall become obsolete in event of revocation, death, or nonpayment of dues. If a former registrant is reinstated, he shall be re-issued his original number. Registration numbers, which have become obsolete will not be re-issued to any registrant other than the original holder thereof.
Okla. Admin. Code § 310:345-5-1