(1) a youth or youth offender may not be detained at any time in a police station, jail, prison or other place where adults are detained, except as follows:

(a) a youth or youth offender may be detained in a police station for up to five (5) hours when necessary to obtain the youth or youth offender’s name, age, residence and other identifying information

(b) a youth waived under 419C.349 (Grounds for waiving youth to adult court) or 419C.364 (Waiver of future cases) to the court handling criminal actions or to municipal court may be detained in a jail or other place where adults are detained if:

(A) the youth is at least 16 AND

(B) the director of the county juvenile department and the sheriff, or other official responsible for the jail or other place, agree to detain the youth in a jail or other place where adults are detained

(c) when detention is authorised by 419C.453 (Detention), a youth offender may be detained in a jail or other place where adults are detained.

(2) a youth waived to the court handling criminal actions or to municipal court pursuant to a standing order of the juvenile court under 419C.370 (Waiver of motor vehicle, boating, game, violation and property cases), including a youth accused of nonpayment of fines, may not be detained in a jail or other place where adults are detained

(3) as used in this statute, “adult” doesn't include anyone who is 18 years of age or older and is alleged to be, or has been found to be, within the jurisdiction of the juvenile court under 419C.005 (Jurisdiction)