Signed Sunday afternoon, January 5, because a snowstorm is expected to shut down the city on Monday. 

Social Security Administration is expected to soon publish more details about the law’s implementation on its website. I thought this was retroactive only to January 2025, but apparently people will receive a year's worth of back pay.  "The amendments made by this Act shall apply with respect to monthly insurance benefits payable under title II of the Social Security Act for months after December 2023."