(a) A utility may allow secondary use by other utilities provided the utility proposing to underbuild has been granted a license from the Department and the low sag vertical clearance is not less than eighteen (18) feet above the high point of the paved portion of the road and/or otherwise is in compliance with the National Electric Safety Code.
(b) If a utility is contemplating installing a facility in a joint trench with someone else, licensing procedures shall be followed by all users of the common trench.
045-5 Wyo. Code R. § 5-14