The appellants, accused in an NIA case registered under Section 18 of the Unlawful Activities (Prevention) Act, 1967, challenged before the Delhi High Court an order of the Special NIA Court extending their judicial custody from 90 to 180 days under Section 43D(2)(b) of the UAPA. The core issue before the High Court was whether such an order granting extension of time for investigation is an appealable order under Section 21 of the NIA Act, 2008, or merely an interlocutory order against which no appeal lies. The NIA argued the order was interlocutory and not appealable, while the appellants contended it had finality as it defeated their right to default bail and directly impacted their liberty under Article 21 of the Constitution. The Court reserved judgment on the preliminary question of maintainability of the appeal after hearing both sides, and the judgment text provided covers only the submissions and analysis up to this point without disclosing the final ruling.