According to laws and regulations of the state that if you are caught for DUI, you will have to give blood or breath test and its refusal can lead you to severe charges. Law enforcement officials will demand you to do voluntary field sobriety test. If you reject to carry out the field sobriety test, the officers will arrest you and ask you to give chemical testing. The chemical tests identify your Blood Alcohol Content. If its amount greater than 0.08% then you will be charged for DUI and your driving rights will be terminated. Chemical testing is performed by using breath test or blood test.