No persons affected by §115.932 of this title (relating to Control Plan Procedure) shall deviate from the terms of the control plans including the date for final compliance and the dates for accomplishing the required steps in such plans. The executive director may, upon application of any person affected, change the date for accomplishing the required steps in a plan. Any control plan that specifies a final compliance date subsequent to the date specified by any sections of this chapter must be approved by the executive director. Approval of a delayed compliance order by the executive director does not constitute satisfaction of all federal requirements nor eliminate the need for EPA approval.