The first step under
Midlantic is to ascertain whether there was an established pre-Code bankruptcy practice. See 474 U. S., at 500-501. That question is easily answered here. Trior to the 1978 enactment of the Code, this Court, as well as every Court of Appeals to address the question, had refused to allow postpetition interest on nonconsensual liens such as the tax lien involved in this case. See
City of New York v. Saper, 336 U. S. 328, 329-341 (1949);
In re Kerber Packing Co., 276 F. 2d 245, 246-248 (CA7 1960);
United States v. Mighell, 273 F. 2d 682, 684 (CA10 1959);
United States v. Bass, 271 F. 2d 129, 130-132 (CA9 1959);
United States v. Harrington, 269 F. 2d 719, 723 (CA4 1959). See also
In re Boston & Maine Corp., 719 F. 2d 493, 495-498 (CA1 1983) (post-Code case not allowing postpetition interest on municipal tax lien), cert. denied
sub nom. City of Cambridge v. Meserve, 466 U. S. 938 (1984). In order to deflect this line of cases, the Court refers to the practice “of denying postpetition interest to the holders of nonconsensual liens, while allowing it to holders of consensual liens,” as “an exception to an exception.”
Ante, at 246. Regardless of how it is labeled, cf.
Henneford v. Silas Mason Co., 300 U. S. 577, 586 (1937) (“Catch words and labels . . . are subject to the dangers that lurk in metaphors and symbols, and must be watched with circumspection lest they put us off our guard”), the practice was more widespread and more well established than the practice in
Midlantic, and was certainly one that Congress “[would have been] aware of when enacting the Code. ”
Ante, at 246.
The denial of postpetition interest on nonconsensual liens was based on the distinction between types of liens as. well as equitable considerations. Unlike consensual liens, to which the parties voluntarily agree, nonconsensual liens depend for their existence only on legislative fiat. Thus, the justification for the allowance of postpetition interest on consensual