<h1>Detention under the National Security Act faces legal challenge; bill seeks to limit party whip and expand MP voting freedom.</h1> A petition challenges the lawfulness and arbitrariness of detention under the National Security Act, with a hearing set to examine procedural safeguards and fundamental-rights implications; separately, a nightclub fire prompted FIRs against owners and organisers and demands for a comprehensive probe into safety-norm enforcement; a bill has been introduced to permit MPs independent voting on non-stability matters, proposing changes to anti-defection and party whip authority.