U.S. Supreme Court
Wolff v. New Orleans, 103 U.S. 358 (1880)
Wolff v. New Orleans
103 U.S. 358
1. As long as a city exists, laws are void which withdraw or restrict her taxing power so as to impair the obligation of her contracts made upon a pledge expressly or impliedly given that it shall be exercised for their fulfillment. Von Hoffman v. City of Quincy, 4 Wall. 636, cited on this point, and approved.
2. Although such laws be enacted, mandamus to compel her to exercise that power to the extent she possessed it before their passage will lie at the suit of a party to such a contract who has no other adequate remedy to enforce it.
3. Meriwether v. Garrett, 102 U. S. 472, distinguished.