Meghalaya Governor Phagu Chauhan administered the oath of office to Justice Vaidyanathan at a simple swearing-in ceremony held at the Durbar Hall of Raj Bhavan here.
The Supreme Court collegium on November 1 last year had proposed to appoint Justice Vaidyanathan as the Chief Justice of the Meghalaya High Court.
Justice Vaidyanathan succeeds Chief Justice Sanjib Banerjee who retired in November last year.
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Justice Vaidyanathan served as a judge of the Madras High Court since October, 2013.
(IANS)