As used in this part:

(a) 24-7 sobriety program has the meaning given the term in § 1300.23(b) of this title.

(b) Alcohol concentration means grams of alcohol per 100 milliliters of blood or grams of alcohol per 210 liters of breath.

(c) Driving while intoxicated means driving or being in actual physical control of a motor vehicle while having an alcohol concentration above the permitted limit as established by each State, or an equivalent non-BAC intoxicated driving offense.

(d) Driving under the influence has the same meaning as “driving while intoxicated.”

(e) FHWA means the Federal Highway Administration.

(f) Ignition interlock system means a State-certified system designed to prevent drivers from starting their car when their breath alcohol concentration is at or above a preset level.

(g) Imprisonment means confinement in a jail, minimum security facility, community corrections facility, house arrest with electronic monitoring, inpatient rehabilitation or treatment center, or other facility, provided the individual under confinement is in fact being detained.

(h) Mandatory sentence means a sentence that cannot be waived, suspended, or otherwise reduced by the State.

(i) Motor vehicle means a vehicle driven or drawn by mechanical power and manufactured primarily for use on public highways, but does not include a vehicle operated solely on a rail line or a commercial vehicle.

(j) NHTSA means the National Highway Traffic Safety Administration.

(k) Repeat intoxicated driver means a person who has been convicted of driving while intoxicated or driving under the influence of alcohol more than once in any five-year period.

(l) Repeat intoxicated driver law means a State law or combination of laws or programs that impose the minimum penalties specified in § 1275.4 for all repeat intoxicated drivers.

(m) State means any of the 50 States, the District of Columbia or the Commonwealth of Puerto Rico.