Treasury regulations come in four forms: the Code: regulations have been issued in their final form and represent the Treasury's interpretations of regulations have a limited life but carry high authoritative weight; regulations, which have the lowest regulations are written under a direct mandate by Congress, take the place of the IRC, and have full effect of the law. authority, and

Treasury regulations come in four forms: regulations have been issued in their final form and represent the Treasury's interpretations of the code: regulations have a limited life but carry high autheritative weight; regulations, which have the lowest authority, and regulations are written under a direct mandate by Congress, take the place of the IRC, and have fuli effect of the law