The One Nation leader has been granted leave to appear before the highest court in the country, arguing the contentious 18C hate speech law is invalid under the constitution. width=device-width, initial-scale=1, shrink-to-fit=no" name="viewport"/>Pauline Hanson wins High Court bid over Racial Discrimination Act Section 18C. The High Court has allowed One Nation leader Pauline Hanson to challenge the constitutional validity of race discrimination laws, reopening a years-long feud with Greens senator Mehreen Faruqi.