(a) Objections shall be filed not later than:

(1) 12 days from the date of filing of a 30-day notice;

(2) 15 days from the date of filing of a 60-day notice; or

(3) 20 days from the date of filing of a 90-day notice.

(b) The Department may accept late-filed objections, upon motion, for good cause shown.

(c) Whenever a notice has been filed earlier than required under §323.5, the Department may extend the time for filing an objection to that notice.