The Austin Chamber of Commerce's board of directors on Thursday announced its opposition to Austin's Propositions A and B, two local ballot initiatives that would require elections for public land use for sports or entertainment and convention center expansions.

Austin's Prop A — not to be confused with Travis County's Prop A, which deals with using hotel occupancy tax dollars to expand the Travis County Exposition Center — would require groups that lease city-owned land for sports or entertainment to pay property taxes or some equivalent payment. The city's Prop A earned its place on the Nov. 5 ballot as a result of a petition by opponents of a Major League Soccer stadium set to be built on city-owned land at McKalla Place in North Austin.

The chamber said Prop A would create an unnecessarily high burden for community groups to pay to use city-owned facilities. The measure also would require action by a super-majority, or nine out of 11 members of the Austin City Council and approval from voters when a facility’s lease comes up for renewal.

Opponents of the proposal have said the measure could lead to millions in additional costs for venues like the Long Center for the Performing Arts and the Zach Theatre, among others.

“This ordinance would discourage new community events and recreational sports hosted at city-owned facilities; this is in direct opposition to the active lifestyle cherished by Austin residents,” the Chamber said.

Fair Play Austin — a political action committee backed by the owner of Circuit of the Americas that helped get Prop A on the ballot — announced in August that it would not campaign for the measure.

Spokesman Chris Lippincott has said the ballot language drifted too far from its original intention.

Proposition B seeks to require elections for expansions of the Austin Convention Center totaling $20 million or more, and that no more than 34% of the city’s hotel occupancy tax go to the facility.

About 70% of occupancy taxes currently go to the convention center.

City leaders have been moving toward a $1.2 billion expansion of the center as a key piece of Mayor Steve Adler's "Downtown Puzzle" plan, which would trade an expansion for hoteliers' support of a tourism taxing district that could fund other community priorities, like addressing homelessness.

UnConventional Austin, a political action committee that has opposed expansion plans, has said those taxes should be reallocated to tourism attractions, including art and music.

The Chamber said it opposes Proposition B because it prevents needed investment in the convention center and would damage tourism.

Early voting for the Nov. 5 election begins Monday.