From the Document: "On January 27, 2020, the Supreme Court of the United States (SCOTUS) lifted two nationwide preliminary injunctions that blocked the implementation of the public charge final rule. The Department of Homeland Security (DHS) published this rule on August 14, 2019, and it was set to take effect on October 15, 2019. Multiple lawsuits and preliminary injunctions had halted the rule; the SCOTUS' ruling now permits its implementation while litigation on the merits continues. U.S. Citizenship and Immigration Services announced that it will begin enforcing the new regulations on February 24, 2020, except in Illinois (where a statewide preliminary injunction is still in effect)."
CRS Insight, IN11217
Congressional Research Service: https://crsreports.congress.gov/