Home » Frequencies » 20 This rule applies if two amateur radio stations want to use the same frequency:   a.   the operator with the newer licence must yield the frequency to the more experienced licensee   b.   the station with the lower power output must yield the frequency to the station with the higher power output   c.   both stations have an equal right to operate on the frequency, the second-comer courteously giving way after checking that the frequency is in use   d.   stations in ITU Regions 1 and 2 must yield the frequency to stations in Region 3