A suspension can occur from either the refusal to submit to a chemical test or results of 0.08 or greater alcohol concentration when a chemical test is taken. This blood alcohol concentration (0.08 grams percent) applies to drivers age 21 and over, but a lower BAC level is applicable to underage drivers or any driver operating a commercial motor vehicle. DPS is also authorized to suspend the drivers licenses of minors who commit the offense of driving under the influence (DUI) as well as individuals who refuse to provide a specimen following an arrest for the offense of boating while intoxicated (BWI). The statutes concerning ALS are found in the Texas Transportation Code at Chapters 524 and 724.