Texas officials argued Thursday that it is legally permissible for SpaceX to restrict access to a public beach during rocket launches, a policy that critics believe violates the state’s constitution.

Several liberal groups in the Rio Grande Valley brought a lawsuit against SpaceX, challenging a 2013 law that allows Elon Musk’s company to temporarily close Boca Chica Beach multiple times a year to conduct launches. The Texas Supreme Court is now considering the case, as lawyers on both sides debate over whether constitutional language guaranteeing residents “unrestricted access” to public beaches is in conflict with the law.