The purpose of this document is to define a minimum common set of supplementary requirements for Additive Manufacturing (AM) in accordance with API Specification 6D, Twenty-fifth Edition, published November 2021, Specification for Valves, incorporating all errata up to and including Errata 3, published October 2023, and all addenda up to and including Addendum 2, published September 2024.   By enabling on-demand, localized production of parts with improved agility, reduced carbon footprint, and enhanced supply chain resilience, Additive Manufacturing (AM) offers a compelling alternative to the traditional oil and gas supply chain models which are vulnerable to global disruptions, long lead times, and high total cost of ownership.