eCFR Reference Browser

---

title: "40 CFR §57.106"

source: "https://www.ecfr.gov/current/title-40/section-57.106"

title_number: "40"

volume_number: "6"

chapter_number: "Unknown"

subchapter_code: "C"

subchapter_subject: "AIR PROGRAMS (CONTINUED)"

part_code: "57"

part_subject: "PRIMARY NONFERROUS SMELTER ORDERS"

subpart_code: "A"

subpart_subject: "General"

section_number: "57.106"

section_subject: "Expiration date."

cfr_reference: "40 CFR 57.106"

title_name: "Title 40"

title_subject: "Protection of Environment"

parts_covered: "Parts 53 to 59"

revised_date: "Revised as of July 1, 2019"

publication_date: "As of July 1, 2019"

contains_description: "Containing a codification of documents of general applicability and future effect"

publication_info: "Published by the Office of the Federal Register National Archives and Records Administration as a Special Edition of the Federal Register"

---

Each NSO shall state its expiration date. No NSO issued under this regulation shall expire later than January 1, 1988.

§57.106 - Expiration date.