The requirement that juveniles be competent to stand trial prior to adjudication in juvenile court has only recently been solidified via case law and/or statutory law. It is currently unclear as to whether and how the presence of a specific juvenile competency to stand trial (CST) statute affects how court actors understand and make use of CST in a juvenile court context. Through interviews with 48 juvenile court officials across two states and three juvenile court jurisdictions, we find that the presence or absence of specific juvenile CST guidelines differentially shapes court officials’ perceptions of the legitimacy of CST concerns and consequently, their case processing strategies and decisions. This exploratory study serves to critically question the role of this new due process protection in a juvenile court context that presumes youthfulness or immaturity of offenders.