Text is here. It is considered a substitution for Senator Cornyn's amendment which would emphasize targets that must be met before the benefits roll out.
I regard this amendment as a waste of money and ineffective on actual enforcement, but I suppose this is the price to pay for comprehensive reform. There are reports that the amendment, up for a vote on Monday, will bring along 6 or so more GOP Senators in addition to the 4 that wrote the bill. So says reporter Alan Gomez on twitter today:
Cosponsors on Hoeven-Corker amendment gives #CIR at least 6 more GOP supporters, on top of the 4 Rs in Gang of 8. The vote is on Monday.