OPINION OF THE COURT
This сase calls upon us to establish the standard for determining a parent’s support obligations for a child placed in residential or foster care. We hold that child support obligations in these circumstances are governed by the guidelines set forth in the Child Support Standards Act (CSSA) (see, Family Ct Act § 413).
Petitioner Dutchess County Department of Social Services commenced these proceedings, one as to each parent, seeking reimbursement for funds expended on behalf of their minor child while she was in residential care. After a hearing, the Hearing Examiner calculated the basic child support obligation of each parent pursuant to the CSSA formula. The Hearing Examiner then found that it was appropriate to deviate from that statutory amount based upon several factors, including the parents’ need to maintain a home for the child; the child’s weekend and other periodic home visits during the placement; and the mother’s inability to work during the relevant time pe *152 riod due to back surgery. Orders of support were entered against both parents in the amount of $3,750 and $625, respectively.
The Department filed objections to the support orders, arguing that the Hearing Examiner improperly deviated from the CSSA standards by allowing certain deductions from the support amounts. Family Court denied the objections, but reasoned that where a child is placed in residential care, a parent’s support obligation is governed by Family Court Act § 415, which in its view affords courts broader discretion in fashioning support awards than the CSSA. Alternatively, the court held that even under the CSSA standards, the orders were supported by the record and not unreasonable under the circumstances. The Appellate Division affirmed, agreeing that Family Court Act § 415 applied in this case. We now affirm, but hold that the support obligations must be calculated in accordance with the CSSA standards as was done properly by the Hearing Examiner.
Family Court Act § 415, last amended in 1977, establishes a relative’s duty to support a recipient of public assistance. In relevant part, section 415 provides that
“the spouse or parent of a recipient of public assistance or care or of a person liable to become in need thereof * * * if of sufficient ability, is responsible for the support of such person * * *. In its discrеtion, the court may require any such person to contribute a fair and reasonable sum for the support of such relative * * * as may be just and appropriate in view of the needs of the petitioner and the other circumstances of the cаse and their respective means” (Family Ct Act § 415 [emphasis added]; see also, Family Ct Act § 445). 1
In 1989, the Legislature enacted the CSSA, governing parents’ child support obligations
(see,
L 1989, ch 567, codified at Family Ct Act § 413). The CSSA guidelines were created in response to Federal legislation representing an effort to reform child support enforcement programs
(see, Matter of Graby v Graby,
The CSSA replaced a needs-based discretionary system with a precisely articulated three-step mеthod for determining child support
(see, Matter of Cassano v Cassano,
Statutes which relate to the same subject matter must be construed together unless a contrary legislative intent is expressed
(see, Matter of Plato’s Cave Corp. v State Liq. Auth.,
*154 Applying these principles here, we conclude that a harmonious reading of the related statutes requires all child support obligations to be determined in accordance with the CSSA formula. Both statutes at issue declare that the support obligation to be paid must be a “fair and reasonable sum” (Family Ct Act §§ 413, 415). Section 415 is a general statute that places the duty on both spouses and parents to support individuals receiving public assistance benefits. However, section 413 (CSSA) — the later-enacted statute — specifically defines what constitutes “fair and reasonable” support in the child support obligation context, providing a precise mathematical formula “while at the same time maintaining the degree of judicial discretion necessary to address unique circumstances” (Matter of Cassano, supra, 85 NY2d, at 652). Section 413 mandates that a court “shall” make its child support awards in accordance with its provisions (Family Ct Act § 413 [1] [a]).
Nothing in the statute or its legislative history suggests that the Legislature intended that the CSSA guidelines were only to be applied to the customary types of child support cases
(see, Bast v Rossoff,
The construction we adopt today reconciles both provisions and leaves a role for section 415. As a result of the changes brought by the CSSA, section 415 establishes support liability when a spousе or a stepchild is a recipient of public assistance
(see,
Besharov, Practice Commentaries, McKinney’s Cons Laws of NY, Book 29A, Family Court Act § 415, at 173). Furthermore, as we noted in
Matter of Commissioner of Social Servs. v Segarra
(
The State’s regulatory scheme regarding parental obligations to children receiving foster care also supports our conclusion. 2 Family Court Act § 422 specifically grants a social services official the right to commence a support proсeeding if so authorized by Social Services Law § 102. That statute allows public welfare officials to pursue “any person liable by law for support * * * of any person cared for at public expense” (Social Servicеs Law § 102 [1]). Upon receipt of a referral from the appropriate social services official, the child support enforcement unit “will petition the court for an order of support pursuant to the child suppоrt standards set forth in section 347.10 of this Title” if no child support order currently exists (18 NYCRR 422.3). The standards set out in section 347.10 mirror the basic child support obligation standards found in the CSSA. Indeed, the worksheet utilized under this regulatory provision expressly states thаt the basic support obligation is defined by Family Court Act § 413 (see, 18 NYCRR 347.10 [b]).
Thus, the statutory and regulatory framework unequivocally supports our conclusion that the CSSA guidelines must be applied whenever child support obligations are calculated, even in residential or foster care reimbursement contexts
(accord, Matter of Joshua W.,
94 Md App 486, 499-501,
Finally, we conclude that the CSSA guidelines were properly applied by the Hearing Examiner to determine child support here. After calculating the basic support obligation, the Hearing Examiner analyzed relevant statutory factors and made specific findings on the record that the application of the *156 basic obligation would be unjust or inappropriate (see, Family Ct Act § 413 [1] [f], [g]). As Family Court held, that determination is supported by the record and is not unreasonable as a matter of law.
Contrary to petitioner’s contention,
Bast v Rossoff
(
Accordingly, the Appellate Division order should be affirmed, with costs.
Chief Judge Kaye and Judges Smith, Levine, Ciparick, Rosenblatt and Graffeo concur.
Order affirmed, with costs.
Notes
. The statute аlso imposes a support obligation on stepparents “in like manner” (Family Ct Act § 415).
. “Foster care” includes “all activities and functions provided relative to the care of a child away from his home 24 hours per day in a fostеr family free home or a duly licensed, certified, or approved foster family boarding home, or a duly licensed or certified group home, agency boarding home, child care institution, health care facility or any combination thereof’ (18 NYCRR 422.1 [c]).
