18 U.S.C. § 3581

1. (a)A defendant who has been found guilty of an offense may be sentenced to a term of imprisonment.
2. (b)The authorized terms of imprisonment are—
   1. (1)for a Class A felony, the duration of the defendant’s life or any period of time;
   2. (2)for a Class B felony, not more than twenty-five years;
   3. (3)for a Class C felony, not more than twelve years;
   4. (4)for a Class D felony, not more than six years;
   5. (5)for a Class E felony, not more than three years;
   6. (6)for a Class A misdemeanor, not more than one year;
   7. (7)for a Class B misdemeanor, not more than six months;
   8. (8)for a Class C misdemeanor, not more than thirty days; and
   9. (9)for an infraction, not more than five days.