(a) Not later than the 45th day after the date a child enters the conservatorship of the department, the child shall receive a developmentally appropriate comprehensive assessment. The assessment must include:
(1) a screening for trauma; and
(2) interviews with individuals who have knowledge of the child’s needs.
(b) The department shall develop guidelines regarding the contents of an assessment report.

(c) A single source continuum contractor under Subchapter B-1, Chapter 264, providing therapeutic foster care services to a child shall ensure that the child receives a comprehensive assessment under this section at least once every 90 days.