Starting Saturday, children under the age of 14 must be accompanied by someone age 14 or older to enter Disneyland or Disney California Adventure.
Cast members will be enforcing the new rule as guests enter the park.
Up until now, there was no age policy for admission at Disneyland, and other Disney theme parks had different policies, said Disneyland spokeswoman Suzi Brown.
The change was not prompted by any issues or incidents, she said.
"We wanted to make (the policies) consistent," Brown said. "We regularly review all of our policies and identified an opportunity to provide a consistent age of admission and address a question we occasionally get from parents."
Employees will not be asking for government I.D. because most children under the age of 14 don't usually have them. Instead, employees will approach anyone who looks young as they enter the main gate and further contact their guardian.
Once the child enters the theme park, they will not be checked for I.D. or asked their age.
The policy will be in effect at all Disney U.S. resorts.
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