Comment by djur

Chevron was ruled in 1984 but it was a codification of principles that had already been in practice. It was a standard Supreme Court ruling, a formalization of precedent. After all, some degree of deference to executive interpretation is required, because it's impossible to write truly unambiguous law in any regular language.

> a committee of leading experts from the private sector and the advocacy side of any given subject matter weigh in yearly on any topic before regulations can be changed

This is part of the design of regulatory agencies. Rulings like this come after an extensive process of consultation and public comment.