I'm pretty sure the key provisions of the STOCK Act were repealed the same weekend as the Boston Marathon Bombings. See the amendment section of the Wikipedia article you linked to.
The amendment makes it significantly more difficult to detect insider trading (since financial disclosure reports are not available online), but I wouldn't describe it as a repeal of the law's "key provisions". See http://www.npr.org/sections/itsallpolitics/2013/04/16/177496... :
"Still, two major elements of the law remain. Insider trading is illegal, even for members of Congress and the executive branch. And for those who are covered by the now-narrower law, disclosures of large stock trades are required within 45 days."
"Still, two major elements of the law remain. Insider trading is illegal, even for members of Congress and the executive branch. And for those who are covered by the now-narrower law, disclosures of large stock trades are required within 45 days."