In compliance with COPPA (Children's Online Privacy Protection Act), all Community Members must be 13 years or older to text. In some instances, age thresholds of 18+ or 21+ are mandated for certain Community accounts as well.
If a birthday was entered incorrectly on the signup form and the Member is actually over 13 years old or another specifically mandated age threshold, then they can sign up again after a 24 hour waiting period.