WASHINGTON: On Thursday a divided US Supreme Court stopped a Louisiana law imposing strict regulations on abortion clinics from going into effect in its first major test on abortion since the retirement of Justice Anthony Kennedy last summer. The court on a 5-4 vote granted an emergency application by Shreveport-based abortion provider Hope Medical Group for Women to block the Republican-backed law from going into effect while litigation continues. However, the four liberal justices were joined by conservative Chief Justice John Roberts in the majority, suggesting that Roberts, as Kennedy used to be, is now the key vote on the issue. Kennedy backed abortion rights in two key cases. Justice Brett Kavanaugh, who President Donald Trump appointed to replace Kennedy, joined the court`s four other conservatives in disagree. Hope Medical Group challenged the law`s requirement that doctors who perform abortions must have an arrangement called "admitting privileges" at a hospital within 30 miles (48 km) of the clinic. Kavanaugh, writing for himself, said it was not clear whether doctors would be unable to obtain the admitting privileges were the law to go into effect. He said that he would have favoured allowing them to bring a later legal challenge if their efforts were unsuccessful. also read Thailand King's sister nominated for PM for 24 March election The law was passed in 2014 but courts had prevented it from going into effect. The Supreme Court itself blocked the law in 2016, two days after hearing another major case involving a similar Texas law that the justices struck down months later. The Center for Reproductive Rights, an abortion-rights group that represents the challengers, said the law could lead to the closure of two of the three abortion clinics operating in Louisiana, a state of more than 4.6 million people. The court on Feb. 1 temporarily blocked the Lousiana law, which was due to go into effect on Feb. 4, while the justices decided how to proceed. also read Australia`s parliament computers tried to hack by an unknown hacker