This document contains final and temporary regulations under section 1301 of the Internal Revenue Code (Code) relating to the averaging of farm and fishing income in computing income tax liability. The regulations reflect changes to the law made by the American Jobs Creation Act of 2004. The regulations provide guidance to individuals engaged in a farming or fishing business who elect to reduce their tax liability by treating all or a portion of the current taxable year's farm or fishing income as if one-third of it had been earned in each of the prior three taxable years. The text of the temporary regulations in this document also serves as the text of proposed regulations set forth in a notice of proposed rulemaking on this subject in the Proposed Rules section in this issue of the Federal Register.