The Legislative Reference Bureau (LRB 3520) and AB426 and SB 24 are basically all the same legislation. The Fiscal 20ll summary lists both the LRB name 3530 and AB426. SB24 would have been the name of this bill in the Senate had this legislation moved forward. 

Fiscal 2011 Summary

What is AB 426? Mining Bill Reference  Page

AB426, LRB3520, SB 24  Avoid the confusion!

LRB 3520  Walker and his little elves present to GTac

Clean Wisconsin - This is a bad bill!