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26 U.S. Code § 6313 - Fractional parts of a cent

In the payment of any tax imposed by this title, a fractional part of a cent shall be disregarded unless it amounts to one-half cent or more, in which case it shall be increased to 1 cent.

Editorial Notes
Amendments

1976—Pub. L. 94–455 struck out “not payable by stamp” after “title”.