, whichever is later, the Permit Board shall take one of the

, whichever is later, the Permit Board shall take one of the actions as follows: (1) issue the permit modification as proposed; (2) deny the permit modification application; (3) determine that the requested modification does not meet the minor permit modification criteria and should be reviewed under the significant modification procedures; or (4) revise the draft permit modification and transmit to the Administrator the new proposed permit modification as required by these regulations. (f) Source's ability to make change. The source may make the change proposed in its minor permit modification application immediately after it files such application. After the source makes the change allowed by the preceding sentence, and until the Permit Board takes any of the actions specified in Rule 6.4.E(1)(e)(1)-(4) the source must comply with both the applicable requirements governing the change and the proposed terms and conditions of the permit. During this time period, the source need not comply with the existing permit terms and conditions it seeks to modify. However, if the source fails to comply with the proposed terms and conditions of its permit during this time period, the existing permit terms and conditions it seeks to modify may be enforced against it. (g) Permit shield. The permit shield does not extend to minor permit modifications. (2) Group processing of minor permit modifications. Consistent with this paragraph, the Permit Board may modify the procedure to process groups of a source's applications for certain modifications eligible for minor permit modification processing. (a) Criteria. Group processing of modifications may be used only for those permit modifications which satisfy the following: (1) meet the criteria for minor permit modification procedures and (2) collectively, are below the threshold level. This threshold shall be 10 percent of the emissions allowed by the permit for the emissions unit for which the change is requested, 20 percent of the applicable definition of major source or 5 tons per year, whichever is least. (b) Application. An application requesting the use of group processing procedures shall meet the requirements of Rule 6.2.C. and shall include the following: (1) a description of the change, the emissions resulting from the change, and any new applicable requirements that will apply if the change occurs; (2) the source's suggested draft permit; (3) certification by a responsible official consistent with Rule 6.2.E, that the proposed modification meets the criteria for use of group processing procedures and a request that such procedures be used; (4) a list of the source's other pending applications awaiting group processing, and a determination of whether the requested modification, aggregated with these other applications, equals or exceeds the threshold set under this rule; (5) certification that the source has notified EPA of the proposed modification. Such notification need only contain a brief description of the requested modification; (6) completed forms for the DEQ to use to notify the Administrator and Affected State(s) as required. (c) EPA and Affected State(s) notification. On a quarterly basis or within 5 business days of receipt of an application demonstrating that the aggregate of a source's pending applications equals or exceeds the threshold level, whichever is earlier, the DEQ promptly shall notify the Administrator and Affected State(s) of the requested permit modifications. The DEQ shall send any notice required under these regulations to the Administrator. (d) Timetable for issuance. The provisions of this rule shall apply to modifications eligible for group processing, except that the Permit Board shall take one of the actions specified in Rule 6.4.E(1)(e)(1)-(4) within 180 days of receipt of the application or 15 days after the end of the Administrator's 45-day review period whichever is later. (e) Source's ability to make change. The provisions of Rule 6.4.E(1)(f) shall apply to modifications eligible for group processing. (f) Permit shield. The provisions of Rule 6.4.E(1)(g) of this rule shall also apply to modifications eligible for group processing. (3) Significant modification procedures. (a) Criteria. Significant modification procedures shall be used for applications requesting permit modifications that do not qualify as minor permit modifications or as administrative amendments. The DEQ shall determine whether a modification is significant. At a minimum, every significant modification in existing monitoring permit terms or conditions and every relaxation of reporting or recordkeeping permit terms or conditions shall be considered significant. (b) Significant permit modifications shall meet all requirements of these regulations, including those for applications, public participation, review by Affected State(s), and review by EPA, as they apply to permit issuance and permit renewal. F. Operational Flexibility. A permitted facility is authorized to make the changes described below within their facility without requiring a permit revision, if the changes are not modifications under any provision of Title I of the Act and the changes do not exceed the emissions allowable under the permit (whether expressed therein as a rate of emissions or in terms of total emissions): Provided that the facility provides the Administrator and the Department with written notification as required below in advance of the proposed changes, which shall be a minimum of seven (7) days, unless other applicable regulations specify a different time frame for emergencies. The source, Department, and EPA shall attach each such notice to their copy of the relevant permit. (1) The permitted sources are allowed to make Section 502(b)(10) changes without requiring a permit revision, if the changes are not modifications under any provision of Title I of the Act and the changes do not exceed the emissions allowable under the permit (whether expressed therein as a rate of emissions or in terms of total emissions). (a) For each such change, the written notification required above shall include a brief description of the change within the permitted facility, the date on which the change will occur, any change in emissions, and any permit term or condition that is no longer applicable as a result of the change. (a) The permit shield described in Rule 6.3.F. shall not apply to any change made pursuant to Rule 6.4.F(1). (2) The Department may provide for permitted sources to trade increases and decreases in emissions in the permitted facility, where the Mississippi State Implementation Plan (SIP) provides for such emissions trades without requiring a permit revision and based on the 7-day notice prescribed herein. This provision is available in those cases where the permit does not already provide for such emissions trading. (a) The written notification required above shall include such information as may be required by the provision in the SIP authorizing the emissions trade, including at a minimum, when the proposed change will occur, a description of each such change, any change in emissions, the permit requirements with which the source will comply using the emissions trading provisions of the SIP, and the pollutants emitted subject to the emissions trade. The notice shall also refer to the provisions with which the source will comply in the SIP and that provide for the emissions trade. (b) Compliance with the permit requirements that the source will meet using the emissions trade shall be determined according to requirements of the SIP authorizing the emissions trade. (c) The permit shield described in Rule 6.3.F shall not apply to any change made pursuant to Rule 6.4.F(2). (3) The Department shall, if a permit applicant requests it, issue permits that contain terms and conditions, including all terms required under Rule 6.3.A and 6.3.C to determine compliance, allowing for the trading of emissions increases and decreases in the permitted facility solely for the purpose of complying with a federally-enforceable emissions cap that is established in the permit independent of otherwise applicable requirements. The permit applicant shall include in its application proposed replicable procedures and permit terms that ensure the emissions trades are quantifiable and enforceable. The Department shall not be required to include in the emissions trading provisions any emissions units for which emissions are not quantifiable or for which there are no replicable procedures to enforce the emissions trades. The permit shall also require compliance with all applicable requirements. (a) The written notification required above shall state when the change will occur and shall describe the changes in emissions that will result and how these increases and decreases in emissions will comply with the terms and conditions of the permit. (b) The permit shield described in Rule 6.3.F shall apply to any changes made pursuant to Rule 6.4.F(3). G. Reopening for cause. (1) Each issued permit shall include provisions specifying the conditions under which the permit will be reopened prior to the expiration of the permit. A permit shall be reopened and revised under any of the following circumstances: (a) Additional applicable requirements under the Federal Act become applicable to a major Title V source with a remaining permit term of 3 or more years. Such a reopening shall be completed no later than 18 months after promulgation of the applicable requirement. No such reopening is required if the effective date of the requirement is later than the date on which the permit is due to expire, unless the original permit or any of its terms and conditions has been extended. (b) Additional requirements (including excess emissions requirements) become applicable to an affected source under the acid rain program. Upon approval by the Administrator, excess emissions offset plans shall be deemed to be incorporated into the permit. (c) The Permit Board or EPA determines that the permit contains a material mistake or that inaccurate statements were made in establishing the emissions standards or other terms or conditions of the permit. (d) The Administrator or the Permit Board determines that the permit must be revised or revoked to assure compliance with the applicable requirements. (2) Proceedings to reopen and issue a permit shall follow the same procedures as apply to initial permit issuance and shall affect only those parts of the permit for which cause to reopen exists. Such reopening shall be made as expeditiously as practicable. (3) Reopenings shall not be initiated before a notice of such intent is provided to the Title V source by the DEQ at least 30 days in advance of the date that the permit is to be reopened, except that the Permit Board may provide a shorter time period in the case of an emergency. H. Reopenings for cause by EPA. (1) The DEQ shall within 90 days after receipt of notification from the Administrator that cause exists to terminate, modify, or revoke and reissue a permit, forward to EPA a proposed determination of termination, modification, or revocation and reissuance, as appropriate. (2) The Permit Board shall have 90 days from receipt of an EPA objection to resolve any objection that EPA makes and to terminate, modify, or revoke and issue the permit in accordance with the Administrator's objection. I. Public participation. Except for administrative permit amendments and modifications qualifying for minor permit modification procedures, all permit proceedings, including initial permit issuance, significant modifications, and renewals, shall provide adequate procedures for public notice including offering an opportunity for public comment and a hearing on the draft permit. These procedures shall include the following: (1) Notice shall be given by publication in a newspaper of general circulation in the area where the source is located or in a State publication designed to give general public notice; to persons on a mailing list developed by the DEQ, including those who request in writing to be on the list; and by other means if necessary to assure adequate notice to the affected public; (2) The notice shall identify the affected facility; the name and address of the permittee; the name and address of the Permit Board; the activity or activities involved in the permit action; the emissions change involved in any permit modification; the name, address, and telephone number of a person from whom interested persons may obtain additional information, including copies of the permit draft, the application, all relevant supporting materials, and all other materials available to the Permit Board that are relevant to the permit decision; a brief description of the comment procedures required by these regulations; and the time and place of any hearing that may be held, including a statement of procedures to request a hearing (unless a hearing has already been scheduled); (3) The DEQ shall provide notice and opportunity for participation by Affected State(s) as is provided for by Rule 6.5; (4) Timing. The DEQ shall provide at least 30 days for public comment and shall give notice of any public hearing at least 30 days in advance of the hearing; (5) The DEQ shall keep a record of all commenters and also of the issues raised during the public participation process. Such records shall be available to the public.