Montana's new consumer data protections law, the Montana Consumer Data Privacy Act (MCDPA), came into effect on October 1st.The MCDPA grants Montana residents the right to access, obtain copies, and request deletion of their personal information held by online companies.It also allows them to opt-out of targeted advertising or sale of their data to third parties.The MCDPA features a universal opt-out requirement, providing users with the option to opt out across multiple websites simultaneously.