Multiple referral
Multiple referral is the process through which a bill is referred to a second committee after the first is finished acting.
In the
However, as a result of a January 1995 change of the House rules, legislation may not be sent to multiple committees simultaneously. Under those same rules, the Speaker of the House must designate one or more primary committees in a joint referral.
In a split referral, legislation is divided into sections, with each part sent to the appropriate committee.
In a sequential referral, legislation is first sent to one committee, then to the next.
In the Senate, multiple referral can occur when jointly motioned by the leaders of both parties (almost never), or when the Senate grants unanimous consent.
References
(*) Sinclair, Barbara (1997). Unorthodox Lawmaking: New Legislative Processes in the U.S. Congress. CQ Press.