A state judge has ordered a group of protesters who have been sitting in a grove of oak trees on the University of California’s Berkeley campus to come down from their perches or face jail time, according to the Associated Press.

The judge, Richard O. Keller of the Superior Court for Alameda County, granted the university’s request to evict the protesters, who have been camping out in the trees for about nine months to protest the university’s plan to cut down some of the oaks to make room for a student athletics center.

Some protesters have vowed to defy the judge’s ruling, the AP reported. His order said that people who were caught “lodging in, scaling, climbing, or hanging” in the trees, or “sitting or standing” in treehouses, hammocks, or platforms in the oak grove could be fined $1,000 each and sentenced to up to five days in jail, according to the AP report.

The university’s plan to build a new athletics facility faces other legal battles as well. The city of Berkeley, for instance, has filed a complaint arguing that the planned center would be built on land that sits on a major earthquake fault, creating a recipe for “unmitigated disaster.” —Sara Hebel