SECTION 1. PURPOSE

This notice publishes the reference price under § 45K(d)(2)(C) of the Internal Revenue Code for calendar year 2023. The credit period for the nonconventional source production credit under § 45K ended on December 31, 2013, for facilities producing coke or coke gas (other than from petroleum-based products). However, the reference price continues to apply in determining the amount of the enhanced oil recovery credit under § 43, the marginal well production credit for qualified crude oil production under § 45I, and the applicable percentage under § 613A to be used in determining percentage depletion in the case of oil and natural gas produced from marginal properties.