• The placement of a juvenile in an institution shall always be a disposition of last resort and for the minimum necessary period. 16. Avoidance of unnecessary delay • Each case shall from the outset be handled expeditiously, without any unnecessary delay. 17. Records • • Records of juvenile offenders shall be kept strictly confidential and closed to third parties. Access to such records shall be limited to persons directly concerned with the disposition of the case at hand or other duly authorized persons. Records of juvenile offenders shall not be used in adult proceedings in subsequent cases involving the same offender. 18. Need for professionalism and training • • Professional education, in-service training, refresher courses and other appropriate modes of instruction shall be utilized to establish and maintain the necessary professional competence of all personnel dealing with juvenile cases. Juvenile justice personnel shall reflect the diversity of juveniles who come into contact with the juvenile justice system. Efforts shall be made to ensure the fair representation of women and minorities in juvenile justice agencies. 19. NON-INSTITUTIONAL TREATMENT • Effective implementation of disposition Appropriate provisions shall be made for the implementation of orders of the competent authority, as referred to in rule 14.1 above, by that authority itself or by some other authority as circumstances may require. • Such provisions shall include the power to modify the orders as the competent authority may deem necessary from time to time, provided that such modification shall be determined in accordance with the principles contained in these Rules. 24 . Provision of needed assistance