Requests for Determination of Eligibility for Processing as a Minor Modification. For modifications not listed in Regulation .13-1 or .13-2 of this chapter, the permittee may request a determination by the Secretary that the modification should be processed as a minor modification. The permittee shall provide the Secretary with the information necessary to support the requested determination. The Secretary shall make a decision on a request for determination made under §A(1) of this regulation as promptly as practicable. In determining whether the proposed modification may be processed as a minor modification, the Secretary shall consider the similarity of the modification to modifications listed in Regulation .13-2 of this chapter. The modification in §B of this regulation may be considered minor only if it meets the following conditions: It involves minor changes that keep the permit current with routine changes to the facility or its operation; and Changes under the modification do not substantially alter the permit conditions or reduce the capacity of the facility to protect human health or the environment.