Original sentence: Because the amount of radio spectrum available for use on the high frequency amateur radio bands is limited, this can result in significant competition for frequencies on which to operate.Contests can bring very large numbers of stations to the high frequency radio bands in a short period of time.Nevertheless, some non-contesters complain that during big contest weekends, all or almost all available radio frequencies on the HF bands are occupied by contesters, and even though any individual contester has as much right to use a frequency as a non-contester, the result is that non-contesters as a group feel that they are left without adequate spectrum in which to operate.Since stations in the Amateur Radio Service must share spectrum and are not assigned specific channels, no one station, contester or otherwise, has a right to use any particular frequency in a radio band.Stations operating in close proximity to one another may create interference
Edited sentence: During big contest weekends, all or almost all available radio frequencies on the HF bands are occupied by contesters, the result is that non-contesters feel that they are left without adequate spectrum in which to operate.Most users of the radio spectrum find the large number of contest stations on a big contest weekend irksome to say the least.Since stations in the Amateur Radio Service must share spectrum and are not assigned specific channels, no one station, contester or otherwise, has a right to use any particular frequency in a radio band, a point which escapes most contesters