A group of citizens in the State of Rdsx gets enough valid signatures on a petition to put a referendum on the ballot that would require the state legislature to adopt a state holiday on Ted Williams's birthday. An all-sports radio station sells advertising time to those who favor the holiday but refuses to sell time for advertisements against the holiday. The anti-Williams group tells the station manager that under Section 315, the manager must give the group "equal opportunity." Who is correct, and why?