(1) Ongoing specialized training shall be provided for persons responsible for investigating child sexual abuse. Training participants shall have the opportunity to practice interview skills and receive feedback from instructors.

(2) The commission, the department of social and health services, the Washington association of sheriffs and police chiefs, and the Washington association of prosecuting attorneys shall design and implement statewide training that contains consistent elements for persons engaged in the interviewing of children for child sexual abuse cases, including law enforcement, prosecution, and child protective services.

(3) The training shall: (a) Be based on research-based practices and standards; (b) minimize the trauma of all persons who are interviewed during abuse investigations; (c) provide methods of reducing the number of investigative interviews necessary whenever possible; (d) assure, to the extent possible, that investigative interviews are thorough, objective, and complete; (e) recognize needs of special populations, such as persons with developmental disabilities; (f) recognize the nature and consequences of victimization; (g) require investigative interviews to be conducted in a manner most likely to permit the interviewed persons the maximum emotional comfort under the circumstances; (h) address record retention and retrieval; and (i) documentation of investigative interviews.