Section 481-3-6 - Certification Prior to the Adoption of these RulesA.Rights and Privileges. Persons certified by the Board as underground oil storage tank installers prior to May 18, 1990 are considered by the Board to be properly certified under these rules as underground oil storage tank installers subject to renewal pursuant to section 9 of this chapter. Persons certified as Class 3 underground oil storage tank installers prior to September 20, 2007 will retain that classification until the certification expires by its own term as is not renewed, is reclassified pursuant to this chapter, is voluntarily surrendered or is revoked pursuant to Chapter 1, whichever is earlier.B.Mechanisms for Reclassifying Certificates. All persons holding Class 1 underground oil storage tank installer certificates prior to April 6, 1992 or Class 2 underground oil storage tank installer certificates prior to September 20, 2007 are considered by the Board to be properly certified under these rules as underground oil storage tank installers subject to renewal pursuant to section 9 of this chapter.