The restrictive covenant was ruled contestable, though not inherently invalid. Both Connolly and White emphasize that this dimension is both "fundamental and irredeemably contestable". The notion that international bodies constitute a discrete level of authority and governance is contestable. This assumption is, of course, quite contestable. Most of NIWA's revenue is from contestable research funding and commercial consultancy work. Annemarie Sammartino argues that this view is contestable. This assertion seems to me to be contestable. The Egyptian physicians recognized three categories of injuries; treatable, contestable, and untreatable ailments. The supply sector are suppliers of electricity to the contestable market. Internet metaphors are contestable and sometimes may present political, educational, and cognitive issues. The APS also operated some functions in the contestable private sector area. The contestable market are end-users with an average monthly peak demand of 750 kilowatts. The contestable market can be serviced by any interested party even without a national franchise. That would make the market more contestable. The title was only contestable by male individual wrestlers.