For purposes of determining the date on which a document has been mailed under Section 59-1-1404, "delivery service" means the following delivery services the Internal Revenue Service has determined to be a designated delivery service under Section 7502, Internal Revenue Code:
(1) DHL Express (DHL): (a) DHL Same Day Service;(b) DHL Next Day 10:30 a.m.;(c) DHL Next Day 12:00 p.m.;(d) DHL DHL Next Day 3:00 p.m.; and(2) Federal Express (FedEx): (a) FedEx Priority Overnight;(b) FedEx Standard Overnight;(d) FedEx International Priority; and(e) FedEx International First; and(3) United Parcel Service (UPS): (b) UPS Next Day Air Saver;(c) UPS 2nd Day Air A.M.;(d) UPS Worldwide Express Plus; and(e) UPS Worldwide Express.Utah Admin. Code R861-1A-44