Turner's plans to turn WTCG into a national cable service were made possible through various FCC deregulatory actions on signal importation during the 1970s; among them was a cable rules package passed in March 1972 that allowed cable systems in the 100 largest markets the right to carry imported signals (including the addition of two distant signals not already available in the market), restricted cable systems in smaller markets to carrying only three network stations and one independent station (except for undefinable markets that would not be limited in the number of carried imported signals), and instituted leapfrogging rules that required systems importing distant independent stations from the top-25 markets to choose from one or both of the two markets closest to the provider's city of license and any systems carrying the signal of a third independent being required to pick up a UHF or, if such a station is not available, VHF station located within a 200 miles radius.