"On the anti-abortion side, four states already have in place so-called trigger laws, designed to make abortion illegal if federal policy permits. Three other states passed laws called statements of policy, establishing the illegality of abortion as an overriding state philosophy. In addition, a few states have pre-1973 abortion bans still on the books, which legal experts say could be reinstated. Abortion bans passed by Louisiana and Utah in 1991 that were immediately struck down by federal courts also remain on the books in both states and could take effect if Roe v. Wade fell, legal experts say. On the abortion-rights side, seven states have codified the principles of Roe v. Wade in state law, and high courts in nine other states have interpreted the state constitution as independently ensuring a woman's right to an abortion."