 
 <prompt> Na which area e fit dey necessary for treaty to need law? Based on di last question, write one context wey get di answer. E fit be 1 - 20 sentences. Context: <response>: Treaties fit fit be seen as 'self-executing', in the sense say just by becoming a party, the treaty and all the things wey e dey oblige go dey work. Other treaties fit no be self-executing and fit need 'implementing legislation'—a change for the domestic law of a state party wey go direct or enable am to fulfill treaty obligations. An example of one treaty wey go need dis kind of legislation fit be one wey go mandate local prosecution by a party for particular crimes. 