In addition, the business community has started its own $6 million lobbying campaign to get the measure approved.
The measure approved today said states would not be forced to do so.
A measure limiting campaign contributions by those doing business with government, known as "pay to play" legislation, was also approved, 34 to 1.
A nearly identical measure was already approved, 57 to 42.
The measure approved yesterday did not go as far as some trustees had wanted.
The measure was approved, 41 to 20, with no Democrats in favor and 4 Republicans against.
Another measure approved by the lawmakers limits public employees to total compensation of $12,000 a month.
The measure approved today was proposed before the court's decision and is more restrictive.
The measure approved tonight would raise that cap to $124,875.
The measure approved Thursday, by a vote of 53 to 47, would raise that figure to $4.3 billion.