No act or proceeding of a Board or any committee thereof shall be called in question on the ground merely of the existence of any vacancy in, or any defect in the constitution of, the Board or such committee, as the case may be.
CHAPTER II CENTRAL AND STATE BOARDS FOR THE PREVENTION AND CONTROL OF AIR POLLUTION
Section 13: Vacancy in Board not to invalidate acts or proceedings
The Air (Prevention and Control of Pollution) Act, 1981