That prevents new laws from being applied retroactively. What would happen if a state law against abortion already existed before Roe vs Wade. It has been unen

That prevents new laws from being applied retroactively. What would happen if a state law against abortion already existed before Roe vs Wade. It has been unenforceable, but was never repealed by state legislature. Would it be legal to retroactively enforce that law now? I know my state had such laws, and there was a push to get them repealed after Barrett was appointed. Don't know if retroactive enforcement was a concern or just future enforcement.