Tax Division - a division of the Department of Justice. The Tax Division deals with civil and criminal cases involving tax laws, and often represents the Internal Revenue Service in court.

Taxes - money collected by federal, local or state government from individuals or businesses for use in public spending.

Treaty - official agreement between two or more sovereign nations. Many treaties establish terms of peace after a war or conflict, or determine the rules nations must follow in theory relationship with other nations. A treaty creates rights or responsibilities, or restricts existing rights or responsibilities.

Treaty ratification - power given to the Senate to accept or reject treaties made by the President. A two-thirds majority is needed to ratify a treaty, as stated by the Constitution in Article II, Section 2, clause 2.