This bill is being rushed through the process so the public does not have much opportunity to comment.
Ultra-conservatives want to block access to any library by people under 18 years old if the library contains anything that the far right considers "obscene." Including materials about same-sex relationships or transgender people. This law would block all minors from access if the library owned a book like this.
For the record:
"There are no obscene materials in public or public school libraries in the United States. This is a moral panic brought forth by the right over books they don’t like and that represent voices, stories, and perspectives outside of the rigid white, straight, able-bodied, cis gender, Christian boundaries."
https://bookriot.com/iowa-rushes-advances-librarian-criminalization-bill/