By July 1, 1991, the Health and Welfare Agency shall develop and disseminate a model needs assessment protocol for pregnant and postpartum substance abusing women in conjunction with the appropriate professional organizations in the areas of hospital administration, substance abuse prevention and treatment, social services, public health, and appropriate state agencies, including the State Department of Social Services, the department, the State Department of Developmental Services, and the State Department of Alcohol and Drug Programs. This model may be utilized by hospitals and counties pursuant to Section 123605.