The Supreme Court on Wednesday refused to entertain two separate pleas challenging the validity of a legal scheme envisaging that a candidate for election of the President must be subscribed by at least 50 MPs or MLAs as proposers and 50 as seconders respectively, saying filing of such cases at the time of polls is not a “healthy practice”. A vacation bench comprising justices Surya Kant and J B Pardiwala was hearing separate pleas filed by Delhi resident Bam Bam Maharaj Nowhattia and Dr Mandati Thirupathi Reddy, a native of Prakasam district in Andhra Pradesh on the issue.