The 1981 Action for Children's Television made it permissible for animated series to be used to promote toylines and merchandise, and the many series that were created as a result would come to define much of the landscape of mid-1980s children's cartoons. "He-Man and the Masters of the Universe" kickstarted this trend, and was followed in subsequent years by properties such as "", "The Transformers", "ThunderCats", "My Little Pony", and "Voltron". The regulations on children's television programming in the United States was instrumental in ending this practice and setting limits to the amount of advertising time which were allocated to children's programs. Currently, any advertisement for a tie-in product within the show, elsewise the entire program will be classified automatically as a violating half-hour infomercial according to the FCC's definition, even if one second of a show's character or reference is seen in an advertising; this clause in Children's Television Act puts the station at risk of paying large fines should the program violate this rule.