Though journalists were now reading the news, union regulations required a journalist acting as news anchor to leave the journalists' union and join the announcers' union and thus prohibited the anchor from doing anything other than reading a script written by others. Burke anchored the show from 1966 until 1969 when he resigned in order to launch a public campaign on the Biafran civil war. Burke was replaced by Warren Davis, at which point the show was renamed "The National" and the program was broadcast in colour. From 1970, the program was anchored by Lloyd Robertson until he was hired away by the CTV Television Network, the CBC's rival, in 1976, largely as a result of Robertson's frustration at not being able to participate in the writing of the newscast due to union rules.