w9wi said:No, that's not required. At least not directly.
Must-carry requires the carriage of most *full-power* stations that deliver an adequate signal to the head-end and are located in the same market as the cable system/viewer. They do not require the carriage of two affiliates of the same network.
You responded to LPs and must-carry. I wasn't discussing must-carry but discussing network retransmission:
The cable system still has to carry the closest of the network affiliate, even if two affiliates (say 2 NBCs) cover the area. It is the responsibility of that affiliate to provide the quality signal though. Whether its Low Power, Full Power, or digital subchannel, in DMA or out of DMA, SV or not SV, historic cable carriage or not, it doesn't matter. The closest affiliate rule trumps.
This stemmed from retransmission consent giving the network affiliates leverage so that the cable system couldn't do a "oh, we'll pick up the Denver network affiliate of NBC from C-Band, and provide our own local news via a cable newschannel" or we'll find another affiliate from the city 60 miles away rather than taking your station. Otherwise, stations like the South Bend, IN WBND-LP would be out of business.
WWSB in Sarasota would be wiped out having no leverage with cable, because cable could just strike a large exclusive deal with larger WFTS.
This is clause makes it so that while the LP can't exercise must-carry, it can have leverage being the closest network affiliate to get on cable.
The introduction of WBOC digital subchannel originally carrying UPN, but gaining Fox affiliation, allowed WBOC to push the Fox channel (which met network status) on both Comcast and Fios in Kent County, DE. You can't say that was SV because it was a new affiliate from out of the DMA. As the crow flies, Dover is closer to Salisbury than Philly. It wasn't retrans because their retrans applies within its own DMA but not within the Philly market. WNEP in Scranton runs a LP station in Allentown that helps preserve it's cable system coverage in the Lehigh Valley. Also it helps keep an ABC signal OTA there, gets Scranton news on cable there, while not introducing a local ABC affiliate that would otherwise harm WPVI.
Note: this only applies to cable and not satellite. Satellite only has to carry full power stations within DMA that elect must-carry.