On Aug. 1, 2013, the US House of Representatives voted 400-20 for a measure that, according to Bloomberg News, would “subject more goods and services to sanctions, in addition to authorizing the president to impose penalties on foreign entities that maintain commercial ties with Iran.”
It must be noted that this in itself does not mean that the measure is law, since the US Senate also needs to vote on the measure. It's expected that the vote will take place after the summer recess in September. Then, the US president must give his approval.