Service of notices and other documents is complete when served by:

(1) Personal service - which means actual, physical delivery to:

(a) The person; or

(b) The designated agent of the person; or

(c) Anyone over the age of eighteen residing at the residence of:

(i) The person; or

(ii) A corporate officer; or

(d) If represented, the attorney representing the person.

(2) Mail - which means deposit in the United States mail with proper postage and properly addressed; service is complete on the third day after mailing, excluding the date of mailing; or

(3) Telefacsimile (fax) - which means faxing to the commission's legal division, with confirmation of the transmission, and the same day deposit of a copy of the faxed document in the United States mail, with proper postage and properly addressed; service is complete on the third day after mailing, excluding the date of mailing; or

(4) Commercial parcel delivery service - which means delivery to the parcel delivery service, when properly addressed and all charges are paid.