http://hdl.loc.gov/loc.uscongress/legislation.105hamdt533 The key differences between Sensenbrenner's proposal and McCollum's amendment were 1) local arbitration versus court lawsuits in rate disagreements, 2) all retail businesses versus only restaurants and bars, 3) 3500 square feet of general public area versus 3500 sqft of gross area, 4) which music licensing societies it applied to (all versus ASCAP and BMI), and 5) freedom from vicarious liability for landlords and others leasing space versus no such provision.