A restraint order made under section 26 of the Prevention of Organised Crime Act 121 of 1998 is appealable despite being interim in nature. While such an order is not definitive or dispositive of the rights of parties in the main proceedings (as contemplated in Zweni v Minister of Law and Order), it is nevertheless final in effect because, absent the limited grounds for variation or rescission in s 26(10)(a), it is unalterable by the court that makes it. The defendant is stripped of restrained assets and control over them in an unalterable situation pending trial, which constitutes finality sufficient for appealability. The Zweni formulation is illustrative rather than immutable, and a decision with final jurisdictional effect can be appealed even if not definitive or dispositive. For purposes of granting a restraint order under s 25(1) of the Act, 'sufficiently related' criminal activity under s 18(1)(c) can include earlier conduct of the same nature as the charged offences, allowing restraint of assets acquired prior to the period specified in the charges where there are reasonable grounds to believe such earlier activity occurred.