Lawmakers in multiple states have introduced extreme anti-abortion measures since Texas enacted a law in September that deputizes private citizens to enforce its six-week abortion ban. The latest is a Missouri legislator who wants to prevent Missouri residents from getting abortions in other states.

State Rep. Mary Elizabeth Coleman introduced an amendment to several bills this week that would allow private citizens to sue anyone who aids or abets a resident traveling to get an abortion outside of Missouri, where getting an abortion is so difficult that many people leave the state for the procedure.

The provision uses the same enforcement mechanism that Texas abortion ban does. Thats why the law is so hard to challenge in court: by delegating enforcement to private citizens instead of the state government, it makes it very hard to build a case before someone has actually been sued under the law. The Supreme Court allowed Texas enforcement mechanism and six-week abortion ban to stand as the lawsuit challenging the constitutionality of the ban proceeds in lower courts. The Missouri provision will likely be able to skirt any major legal challenges in the same way Texas law has.

Coleman added her amendment to several bills that recently made it through a committee and are awaiting a state House floor vote.