Overview
- President Trump signed the presidential memorandum on Monday, June 29, 2026, directing the Environmental Protection Agency to act on vehicle emissions repair rules.
- The memo tells the EPA to issue guidance within 30 days on what emissions repairs individuals may lawfully perform and to create faster alternative certification pathways for aftermarket emissions parts.
- The White House singled out the California Air Resources Board's certification as a costly bottleneck, noting CARB Executive Orders can take well over a year and raise prices for compliant replacement parts.
- The memorandum asks the EPA to consider deprioritizing civil enforcement against people who, in good faith, try to return vehicles to their original emissions configuration but does not change the law.
- Practical effects will depend on forthcoming EPA guidance, future agency rulemaking, budget choices, and possible legal or state responses, with consumers and independent shops likely to see the first impacts if the agency follows the memo.