legislative bill
Refers to a draft of a law proposed in a legislative body such as the Diet.
政府は新しい法律案を国会に提出した。
The government submitted a new bill to the Diet.
法律案 is the full, more formal term for a proposed law, while 法案 is the shorter form commonly used in news and politics.
Compound of 法律 (law) and 案 (draft, proposal).