(1) the permit has attained a level of sufficient priority in accordance with the priority system set forth under section 750-1.19 of this Subpart for the department;

(2) satisfaction of the terms of a special permit condition or requirement has not achieved expressed objectives of the special permit condition or requirement;

(3) when required to satisfy a condition or conditions of a permit;

(4) to adjust permit limitations, where adjustment of such permit limits would not cause the permittee to violate such adjusted permit limits and adjustment of the permit limitations is necessary to allow a new or increased discharge from another permittee in accordance with a total maximum daily load/waste load allocation/load allocation as set forth in 40 CFR 130.7 (see section 750-1.25 of this Subpart);

(5) to correct technical mistakes, such as typographical errors and errors in calculation, or mistaken interpretations of law made in determining permit conditions or to make changes to monitoring requirements or make other minor technical adjustments;

(6) to implement a department initiative that is a legal requirement from applicable law or regulation; or

(7) when necessary to comply with the Clean Water Act.