Explanation:

A constitutional challenge to the Tenth Schedule which was inserted in the Consitution in 1985 was settled by the apex court in Kihoto Hollohan case.

The principal question before the Supreme Court in the case was whether the powerful role given to the Speaker violated the doctrine of Basic Structure — the judicial principle that certain basic features of the Constitution cannot be altered by amendments by Parliament, laid down in the landmark judgment in Kesavananda Bharati vs State Of Kerala (1973).

• Judgement stated that the Speakers/Chairmen hold a pivotal position in the scheme of Parliamentary democracy and are guardians of the rights and privileges of the House.
• They are expected to and do take far reaching decisions in the Parliamentary democracy. Vestiture of power to adjudicate questions under the Tenth Schedule in them should not be considered exceptionable.