In
legislative procedure, a
rider is an additional provision added to a
bill or other measure under the consideration by a
legislature, having little connection with the subject matter of the bill. Riders are usually created as a tactic to pass a controversial provision that would not pass as its own bill. Occasionally, a controversial provision is attached to a bill not to be passed itself but to prevent the bill from being passed (in which case it is called a
wrecking amendment or poison pill).