Section 230 of the Communications Decency Act of 1996

Sec. 230
Refers to Section 230 of the Communications Decency Act of 1996 (Title 47, Chapter 5, Subchapter II, Part I § 230) is a provision that may provide civil immunity to  a "provider or user of an interactive computer service" for content provided by another person or entity.

This immunity would apply, for instance, to blogs that permit comments or message boards that allow users to start and discuss threads.