The law bans California authorities from cooperating with law enforcement from states where abortion is banned when investigating abortion pills sent by mail. It also prohibits bounty hunters or bail agents from apprehending doctors, pharmacists and patients in California and transporting them to states where they are wanted for providing or receiving an abortion.

https://www.thegatewaypundit.com/2023/09/newsom-signs-law-protecting-doctors-who-mail-abortion/