The referendum for this proposal went to ballot in 2000 and was rejected.
If the referendum is rejected, according to Hanson, it can't be put on the ballot again until two years from now.
The referendum faced strong opposition and was rejected despite the fact that $270 million had previously been approved to build stem cell research centers.
Thirteen years ago, a referendum on adding about 8,000 square feet to the library at a cost of $12 million was overwhelmingly rejected.
A referendum for a fifth high school was rejected on February 20, 2007.
The referendums on the matter - held in 1983, 1994 and 2004 - were all rejected by Swiss voters.
A referendum directed at legalizing this practice was rejected on 1 June 2008.
The referendum was rejected with a huge margin, but firefighter numbers were reduced regardless.
The referendums to split the city were rejected by voters in November 2002.
Holt also has hinted at the possibility of moving the franchise should the referendum be rejected.