(a) When, if the youth were an adult, the youth could be arrested without a warrant; or
(b) When the juvenile court, by order indorsed on the summons as provided in ORS 419C.306 or otherwise, has ordered that the youth be taken into custody.
(2) In any order issued under subsection (1)(b) of this section that may result in a substitute care placement or detention, the court shall include a written finding describing why it is in the best interests of the youth to be taken into custody.
(3) A peace officer or person authorized by the juvenile court shall take a youth into custody if the peace officer or person authorized by the juvenile court has probable cause to believe that the youth, while in or on a public building or court facility within the last 120 days, possessed a firearm or destructive device in violation of ORS 166.250, 166.370 or 166.382. [1993 c.33 §158; 1993 c.546 §59; 1997 c.727 §1; 1999 c.577 §3; 1999 c.1095 §13; 2001 c.686 §8]