That amount is separated into smaller amounts for each of the twelve Subcommittees. The federal budget does not become law and is not signed by the President. Instead, it is guide for the House and the Senate in making appropriations and tax decisions.
The budget amount is distributed among the twelve Subcommittees.  It is not enacted into law nor signed by the President; instead, it acts as a framework for the House and Senate when deciding on spending and taxes.