Washington (CNN) A judicial conduct panel has dismissed 83 ethics complaints against Justice Brett Kavanaugh, saying it has no authority over Supreme Court justices.

The complaints arose in part from Kavanaugh's conduct at his contentious confirmation hearing that included an accusation of sexual assault while a teenager as well as his testimony at prior hearings.

The ruling affirms a finding by 10th Circuit judicial council that dismissed the complaints in December.

Kavanaugh, then a judge on the US Court of Appeals for the District of Columbia Circuit, made national headlines after his Supreme Court nomination when Christine Blasey Ford accused him of sexual assault in the 1980s . The accusation led to significant uncertainty regarding Kavanaugh's nomination as Ford testified to a Senate judiciary committee in late September. Kavanaugh denies the allegations.

During his confirmation hearing, Kavanaugh claimed the accusations arose from "a calculated and orchestrated political hit, fueled with apparent pent-up anger about President Trump and the 2016 election ... revenge on behalf of the Clintons and millions of dollars in money from outside left-wing opposition groups."

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