DFPS must develop a case plan for every child in DFPS conservatorship no later than 45 days from the date DFPS was appointed temporary managing conservator of the child. The case plan is comprised of a "child service plan" and, when applicable, a "family service plan." The case plan must conform to all relevant requirements in Titles IV-B and IV-E of the Social Security Act, and Chapter 263 of the Texas Family Code.