Complex sentence: In September, 2007, the Commission approved a regulation that requires cable systems to carry the analog signals if the cable system uses both types of transmission, they left the decision to also retransmit the digital signal up to the cable provider.
Split into simpler sentences: In September, 2007, the Commission approved a regulation that requires cable systems to carry the analog signals if the cable system uses both types of transmission. They left the decision to also retransmit the digital signal up to the cable provider.