(b)in the case of a Member of the Appellate Tribunal,–(i)is, or has been, or is qualified to be, a Judge of a High Court; or(ii)is, or has been, a Secretary for at least one year in the Ministry or Department of the Central Government dealing with economic affairs or matters or infrastructure; or(iii)is, or has been, a person of ability and standing, having adequate knowledge or experience in dealing with the matters relating to electricity generation, transmission and distribution and regulation or economics, commerce, law or management.