ensure effective prevention against fraud, especially in areas with a higher level of risk, and which will act as a deterrent, having regard to the costs and benefits as well as the proportionality of the measures;
cosaint éifeachtach a áirithiú i gcoinne calaoise, go háirithe maidir leis na réimsí a mbaineann leibhéal níos airde riosca leo, ar bac í an chosaint sin, ag féachaint do na costais agus do na sochair chomh maith le comhréireacht na mbeart;