The Code of Federal Regulations is a codification of the general and permanent rules published in the Federal Register by the Executive departments and agencies of the United States Federal Government.

This print ISBN is the U.S. Federal Government official edition. 40CFR, Parts 1000-1059, continues coverage of Protection of Environment, Environmental Protection Agency (EPA). Topics treated include: fees for engine, vehicle, and equipment compliance programs; control of emissions from locomotives and various engines; and more. Related items: The Annual CFR Print Subscription can be found here: https://bookstore.gpo.gov/products/code-federal-regulations-subscription-service-2017-paperback-0 CFR Title 40, Protection of Environment publications can be found here: https://bookstore.gpo.gov/catalog/cfr-title-40-protection-environment ​Environment & Nature resources collection is available here: https://bookstore.gpo.gov/catalog/environment-nature