(a) In a proceeding under this Article, a minor who was under 15 years of age at the time of the commission of an act that if committed by an adult would be a violation of Section 9-1, 9-1.2, 9-2, 9-2.1, 9-3, 9-3.2, 9-3.3, 11-1.20, 11-1.30, 11-1.40, 11-1.50, 11-1.60, 12-13, 12-14, 12-14.1, 12-15, or 12-16 of the Criminal Code of 1961 or the Criminal Code of 2012 must be represented by counsel throughout the entire custodial interrogation of the minor.
     (b) In a judicial proceeding under this Article, a minor may not waive the right to the assistance of counsel in the minor’s defense.