When the Louisiana state legislature passed the nation's most restrictive abortion law over the governor's veto in 1991, it was continuing a strong anti-abortion tradition dating back to the years preceding Roe v. Wade. The 1991 law outlawed all abortions except to save the woman's life, and in cases of rape and incest reported to police and medical authorities before the woman could know she was pregnant. The state continued to defend the law, appealing all the way to the Supreme Court, even after the Court had laid out the "undue burden" requirement in Planned Parenthood of Southeastern Pennsylvania v. Casey. In March 1993 the Supreme Court declined to review a lower court ruling that Louisiana's anti-abortion law is unconstitutional.