Who was the president who passed legislation for 401k plans?

The 401(k) plan was established as part of the Revenue Act of 1978, which was signed into law by President Jimmy Carter. This legislation allowed employees to save for retirement by deferring a portion of their income into a tax-advantaged account. The specific provisions for the 401(k) plan were implemented later in the early 1980s, leading to its widespread adoption in the following years.