Can I enroll in prepaid tuition to have a protection from future fee increase

[1NJParent]

According to savingforcollege.com,

There are currently 18 state-sponsored and one institution-sponsored prepaid plan, the Private College 529 Plan. However, only 10 of these are currently accepting new applicants, and many have residency requirements.

Prepaid tuition plans

The article has links to all such plans.