CANBERRA — Australia’s major political parties are calling for a planned U.S. military execution not to be broadcast in the country, while its online safety regulator says it lacks authority to stop material in advance of publication. The unusual cross-party opposition emerged Monday as Parliament resumed debate on legislation that would impose new requirements on social media platforms to protect users from serious harms. The Labor government, the center-right Coalition, One Nation and the Greens have all opposed showing the execution in Australia. U.S. Defense Secretary Pete Hegseth plans to livestream the Dec. 3 firing-squad execution of former Army Maj. Nidal Malik Hasan. Hasan’s is set to be the U.S. military’s first execution in six decades. Assistant Defense Minister Peter Khalil said Monday that he opposed livestreaming the execution. The eSafety regulator, however, has disclosed that it cannot prospectively block material before it is shown, leaving open questions about what steps Australia could take if a broadcast is planned for local audiences. The debate places a sensitive question about graphic content and online distribution alongside the government’s broader effort to tighten platform responsibilities. The cross-party resistance signals a rare point of agreement in Canberra, but the regulator’s stated limits leave a gap between political opposition and the ability to prevent a broadcast in advance.