Under Implied Consent Laws
Your Missouri drivers license (or your right to drive in Missouri if you do not have a valid Missouri operators license) may be revoked for one year under implied consent law for refusing to submit to a chemical (breath) test. If you failed a breath test (or other chemical test), you generally face a shorter suspension / revocation (depending on your five year DWI history).
Under Criminal Laws
If you are convicted of the Missouri DWI offense or Excessive BAC offense, you will also lose your Missouri drivers license (or your right to drive in Missouri if you don’t have a valid Missouri license) for 30 days followed by 60 days of restricted driving privileges. If this is your second conviction, you face a license revocation ranging from one to five years. Talk to your Missouri DWI attorney for possible revocation lengths for your situation.