(1) The applicant shall submit supplemental material to the department within 15 days after it becomes available following filing of an application. The applicant shall submit supplemental material in the form of substitute pages or insertions to the application as originally filed. Supplemental material includes information to update or finalize information submitted with the original application and the following:
(a) studies that an applicant routinely or periodically updates;
(b) changes in the application that result from a change in any statute, standard, permit requirement or implementation plan affecting the facility; and
(c) any other changes materially affecting the basis of need for the facility, the engineering design of the facility, the costs or the environmental impact of the facility.
(2) The penalty defined by 75-20-408 , MCA, shall be imposed for failure to submit supplemental material available to the applicant but not known to the department, effective within 30 days of the date the material becomes available to the applicant. If the material is extensive, the applicant may within the 30-day period submit to the department a notice of intent to supplement the application with a description of the material to be supplied, and supply the material without undue delay in a time period agreed to by the applicant and the department.