 There are relatively few third-party affiliate stations of Canada's commercial networks; they typically follow the schedule of an O&O in a nearby major market, but with opt-outs for local newscasts and other local programming, and may also simulcast the station's newscasts in timeslots where they do not air their own (essentially acting as a third-party semi-satellite).Corus-owned CTV affiliates substituted CTV News programs with Global News programs, and CHEX-TV-2 additionally branded as "Global Durham" despite otherwise being a CTV affiliate.CHEX-DT/Peterborough is within the range of CTV's Toronto station CFTO-DT, and both are carried on cable locally; the stations ultimately became Global stations after the affiliation expired.