Imperative mandate is a political system in which parliamentary deputies can only enact policies in accordance with concretely transmitted preference by their electors. The institution of imperative mandate has been rarely applied. Some political scientists have argued an imperative mandate would limit the freedom of parliamentary deputies. Others state that there is no democratic value in freeing them from their voters' influence, and that such freedom would expose them to bribery and such. The imperative mandate was banned by the royalist members of the French National Assembly of 1789 to block greater influence by the people.