Six Flags Great America in Gurnee has implemented a policy requiring children under the age of 16 to be accompanied by an adult starting on Thursday.
The theme park announced on Monday that its chaperone policy will be reimplemented later this week.
Under the policy, all guests ages 15 and younger must be accompanied by a person who is at least 21 years old in order to be admitted and remain in the park.
The policy will be in effect all day starting Thursday through Sunday.
After this Sunday, the policy will be in effect every day beginning at 5 p.m. until the park closes.
“The park reserves the right to implement the policy earlier as needed,” Six Flags said, adding that the policy also applies to Hurricane Harbor.
The chaperone must present a valid government-issued photo identification that shows a date of birth at the time of ticket entry, Six Flags said.
A chaperone can only accompany 10 or fewer children who are 15 or younger.
The chaperone must accompany the party during entry, remain inside the park during their visit and be available by phone throughout their visit.
Guests 16 years of age or older may be asked to present a valid government-issued photo identification that shows a date of birth at the time of ticket entry to verify their age.
Six Flags said guests may be denied entry into the park if they cannot produce their identification.
Visitors ages 15 years old or younger who are found inside the park unaccompanied by a chaperone could be kicked out of the park.
The chaperone requirement applies to all Six Flags Great America One-Day Ticket holders, Season Pass holders and Members.
Six Flags said parents and guardians are responsible for the behavior of their minor children.
“Appropriate behavior and supervision are the responsibility of the parent/guardian and is always expected. We strongly recommend that minors (under 18 years of age) be accompanied by an adult. The park does not assume any responsibility or liability for unattended minors. Parents/guardians may be held legally liable for all acts of the minors under their care,” the amusement park said in its policy.
The policy was previously temporarily implemented in September for Fright Fest.
The company said at that time that there had been increasing incidents of unruly and inappropriate behavior across the industry and at other major entertainment venues.
“We believe these changes will help ensure that Six Flags Great America continues to have a positive atmosphere where thrill-seekers can gather for a day of safe, fun and thrilling experiences,” Six Flags previously said.