President signs "Truth in Caller ID Act of 2009" -- robocalls must have accurate caller ID

S.30: Truth in Caller ID Act of 2009 - U.S. Congress - OpenCongress:
"Amends the Communications Act of 1934 to make it unlawful for any person in the United States, in connection with any telecommunications service or Internet protocol (IP)-enabled voice service, to cause any caller identification (ID) service to transmit misleading or inaccurate caller ID information with the intent to defraud, cause harm, or wrongfully obtain anything of value"

The President signed this bill on December 22.