dnd 5th – What capacity (if any) is used for the reaction test during a hearing?

In the rules for hearings, once the starting attitude has been established by an Intelligence check (Traditions) and a comparison of the cultures on the Starting Attendance table, players can ask people with whom they sought an audience. The reaction CC for this request is determined by the starting attitude, but no capacity check is listed. Is this meant to be a raw die roll? It seems to me that charisma (persuasion) would be appropriate, but it is not mentioned.