Shelter From The Storm

From AP:

"Sex offenders tracked by the state are banned from public hurricane shelters in Florida under a new policy that allows them to weather the storms in prison instead."

I've been fortunate (so far) to avoid having to seek shelter in a public shelter during a hurricane so I'm not sure exactly what goes on there but I can't see how this directive is going to be enforced. If some sex offender doesn't identify himself as such, how can he be kept from the shelter? Or are the authorities counting on these people following the instructions they've been given and head to the local pokey instead? Uh, uh...