bookriot.com/challenged-books-in-school-libraries What Happens to a Book That’s Challenged But Not Removed in a High School Library?
In Texas, a challenged library book must be kept from students until the school board acts, which can mean 90 days or more off the shelf even if it's kept. Fairfax County keeps it available throughout the review, and Hanover splits the difference.
— via Book Riot, Nikki DeMarco