Establishes provisions relating to civil liability for publishing or distributing material harmful to minors on the internet

HB 1878 requires commercial websites where 33% or more of content is defined as "material harmful to minors" to use reasonable age-verification methods before minors can access it. If a website fails this, it could be sued for damages if a minor accesses the content. The law specifically exempts news organizations and internet service providers (like search engines or cloud services) from liability, as they aren't responsible for the content they transmit. It defines "material harmful to minors" as content appealing to prurient interest, depicting sexual acts, or lacking serious value for minors, per Missouri law. The bill includes an emergency clause citing child safety as the justification for immediate implementation.