Queensland students face permanent travel bans if they abuse a policy introduced after the disappearance of schoolboy Daniel Morcombe.
The Newman government says students in some areas have been blatantly dodging bus fares, under a system that was introduced to keep kids safe.
The no child left behind policy was brought in after Daniel disappeared from a Sunshine Coast bus stop in 2003, after a bus that was running late failed to stop for him.
Bus drivers are now required to stop for children, regardless of whether they have the money to pay their fare.
From Monday, students found to be abusing the policy face permanent travel bans.
Transport Minister Scott Emerson says the new guidelines are necessary, because on some routes the policy is being blatantly abused.
"On some of these routes, as much as half of students getting onboard buses claim they have no money for fares," he told ABC Radio.
"This is clearly a planned way to exploit the system."