The US Supreme Court has overturned the Chevron principle, and the SEC no longer has the power to interpret vague laws

The US Supreme Court struck down one of its most important precedents - the Chevron doctrine, part of US administrative law that gives federal agencies the power to interpret laws when they are ambiguous.
The ruling has major implications for the rulemaking capabilities of the Securities Exchange Commission (SEC) and other federal agencies, weakening their authority in administrative law.