"regation of the limits of liability, specify which policy coverages are primary, secondary and excess and the total amount of recovery thereunder when a person is an occupant of a nonowned vehicle and specify the availability of coverage when a person is an occupant of an owned vehicle, relettered former Subsec. (d) as Subsec. (e) and added Subsec. (f) re coverage of a named insured injured in the" . . . .