sentences:  The doctrine was implied in "Wooley v. Maynard" in 1977, when the Supreme Court acknowledged a legitimate government interest in communicating an official, ideologically partial message to the public.In the 1991 case of "Rust v. Sullivan", government-funded doctors in a government health program were not allowed to advise patients on obtaining abortions, and the doctors challenged this law on Free Speech grounds.However, the Court held that because the program was government-funded, the doctors were therefore speaking on behalf of the government.