Due to a lack of prescriptive international standards, FIUs maintain significant differences as regards their functions, competences and powers.
De dheasca easpa caighdeán idirnáisiúnta forordaitheach, cothaíonn FIUnna éagsúlachtaí suntasacha maidir lena bhfeidhmeanna, a n-inniúlachtaí agus a gcumhachtaí.