The plaintiff appeals from a judgment of the Superior Court dismissing her appeal from the denial by the Juvenile Court of her motion to “reopen” the commitment of a minor child to the welfare commissioner.
On October 10, 1974, the plaintiff filed a motion to “reopen” commitment in Juvenile Court. That motion alleged that, in 1968, a child was placed by her mother with the plaintiff. In 1969, the plaintiff attempted to adopt the child but the natural mother did not consent. In June, 1973, the Juvenile Court, acting upon a petition of neglect against the mother, granted temporary custody of the child to the welfare commissioner who, in turn, placed the child *632in the plaintiff’s home where the plaintiff assumed the role of a foster parent. In February, 1974, the Juvenile Court committed the child to the custody of the welfare commissioner who continued the child’s placement in the plaintiff’s home. On October 3, 1974, the welfare commissioner removed the child directly from school to the home of the natural mother. The motion also alleged that the plaintiff, although not the biological mother of the child, is the psychological and emotional parent of the child. The plaintiff alleged that the child had lived with her from September, 1968, to October 3, 1974. In the appeal from the Juvenile Court to the Superior Court, the plaintiff alleges that the child was represented by counsel.
The Juvenile Court treated the motion as one made under General Statutes § 17-62 (f), and considered it as a motion to revoke the commitment of the child to the welfare commissioner. Both parties have characterized the motion in this manner. The Juvenile Court ruled that it had no jurisdiction to hear the plaintiff’s motion because § 17-62 (f) fails to include a foster mother as one who may file a motion to revoke. The Superior Court denied the plaintiff’s appeal from the Juvenile Court on the same grounds.
The plaintiff has assigned as error the court’s failure to find that a foster parent is a “parent” as the word is used in General Statutes § 17-62 (f); that a foster parent has standing to file a motion to revoke commitment in Juvenile Court; that the Juvenile Court has jurisdiction to entertain a motion by a foster parent to revoke commitment.
We turn initially to the plaintiff’s contention that she is among those listed in § 17-62 (f). General *633Statutes § 17-62 (a)2 empowers the Juvenile Court to summon the parents or guardian of a child to appear in eourt when a petition is filed containing information that a child is uneared for and neglected. Subsection (d) of § 17-623 provides that after a hearing and adjudication that a child is uncared for or neglected the court may commit the ehild to the welfare commissioner or other persons and agencies designated in the statute.
The power to revoke such commitment is controlled by §17-62 (f),4 which restricts the right to *634file an application for revocation to a “parent,” a “relative” and other persons or agencies named therein.
We find without merit the plaintiff’s contention that her status is to be found among those listed in §17-62 (f). The meaning to be given a statute is determined by legislative intent and that legislative intent must be determined by language actually used in the legislation. Knoll v. Kelley, 142 Conn. 592, 594, 115 A.2d 678. Poster parents are not mentioned in § 17-62 (f). If the legislature had intended to include a foster parent among the persons permitted the right to file an application to revoke commitment, it could easily have done so. Our statutes contain numerous instances in which a distinction is drawn between natural or adoptive parents and foster parents.5 We presume that the legislature was aware of the use of foster homes when it enacted § 17-62 (f) since it specifically authorized the welfare commissioner to place children committed to him in foster homes in §17-62 (d). We, therefore, conclude that the legislature intentionally excluded foster parents from §17-62 (f).
*635The plaintiff also contends that the Juvenile Court has jurisdiction to entertain a motion by a foster parent to revoke commitment. The Juvenile Court is a statutory court. General Statutes §§ 17-53 to 17-74. “It is a familiar principle that a court which exercises a limited and statutory jurisdiction is without jurisdiction to act unless it does so under the precise circumstances and in the manner particularly prescribed by the enabling legislation.” Heiser v. Morgan Guaranty Trust Co., 150 Conn. 563, 565, 192 A.2d 44. Under §17-62 (f), one of those specified persons or agencies must apply to trigger the Juvenile Court’s power to revoke the commitment to the welfare commissioner. As the plaintiff did not fall within one of those categories, the Juvenile Court did not have jurisdiction to revoke the commitment under §17-62 (f).
The plaintiff asserts that the due process clause of the federal constitution’s fourteenth amendment guarantees her the right to initiate a hearing to revoke the commitment to the welfare commissioner. The record of the proceedings of the Juvenile Court includes only a motion entitled “motion to reopen,” the court’s memorandum of decision and a transcript devoted entirely to comments of counsel. At the hearing on the motion, counsel admitted that the plaintiff was a party at the neglect hearing. The Juvenile Court’s memorandum of decision also states that the plaintiff was represented by counsel at that hearing. In any event, there is no claim that the plaintiff was deprived of due process because of the hearings in June, 1973, and in February, 1974. As a result of those hearings, the welfare commissioner was made guardian of the children. The plaintiff had an opportunity to request that *636the child he committed to her as a person “suitable and worthy” of the responsibility of earing for the child. See General Statutes §17-62 (d). In her “motion to reopen,” she made no claim that was different from that which she could have made at the neglect hearing. She had an opportunity to be heard at the most critical time in the proceedings before the Juvenile Court. Due process does not require a rehearing of issues that have been litigated. See cases in 16 Am. Jur. 2d, Constitutional Law, § 583.
While the principal brief is mainly concerned with the plaintiff’s right to be heard upon the deprivation of her interests in the child, and while the argument is in traditional due process terms, the plaintiff’s reply brief emphasizes an equal protection argument: “Appellee has incorrectly stated in his brief that Appellant does not challenge the constitutionality of the classification by the legislature of those persons perfnitted to seek revocation of commitment in Juvenile Court. . . . Appellant does argue that the word ‘parents’ in the relevant statute, C.G.S. § 17-62 (f), can be construed to include foster parents. . . . However, if this Court does not see fit to adopt this construction, then Appellant argues it has no other choice but to find C.G.S. § 17-62 (f) unconstitutional.” As to her claim of lack of due process because she was not included with the other persons allowed to bring motions for revoking commitment under § 17-62 (f), the argument concerns her right under the equal protection clause of the fourteenth amendment. The issue, then, is not whether a foster parent should be included as one who may initiate a hearing to preserve interests in a child, but whether a foster parent should be included among those who may *637move to revoke a commitment to the welfare commissioner, now commissioner of children and youth services.
The requirement of equal protection of the laws does not deny a state the right to make classifications in law so long as there is no invidious discrimination. Williamson v. Lee Optical of Oklahoma, Inc., 348 U.S. 483, 489, 75 S. Ct. 461, 99 L. Ed. 563, reh. denied, 349 U.S. 925, 75 S. Ct. 657, 99 L. Ed. 1256. “Under traditional equal protection principles, a State retains broad discretion to classify as long as its classification has a reasonable basis.” Graham, v. Richardson, 403 U.S. 365, 371, 91 S. Ct. 1848, 29 L. Ed. 2d 534. In the area of social welfare, a statute is not impermissible because the classifications are imperfect. So long as a classification has some reasonable basis, the statute does not offend constitutional requirements simply because a classification found therein “ ‘is not made with mathematical nicety or because in practice it results in some inequality.’ Lindsley v. Natural Carbonic Gas Co., 220 U.S. 61, 78 [31 S. Ct. 337, 55 L. Ed. 369].” Dandridge v. Williams, 397 U.S. 471, 485, 90 S. Ct. 1153, 25 L. Ed. 2d 491, reh. denied, 398 U.S. 914, 90 S. Ct. 1684, 26 L. Ed. 2d 80. In McGowan v. Maryland, 366 U.S. 420, 81 S. Ct. 1101, 6 L. Ed. 2d 393, the court said (p. 425): “Although no precise formula has been developed, the Court has held that the Fourteenth Amendment permits the States a wide scope of discretion in enacting laws which affect some groups of citizens differently than others. The constitutional safeguard is offended only if the classification rests on grounds wholly irrelevant to the achievement of the State’s objective. State legislatures are presumed to have acted within their *638constitutional power despite .the fact that, in practice, their laws result in some inequality.” A proper classification must include all who naturally belong to the class. There must be some natural and substantial difference germane to the subject or purposes of the legislation between those within the class and those excluded. Kellems v. Brown, 163 Conn. 478, 493, 313 A.2d 53, appeal dismissed, 409 U.S. 1099, 93 S. Ct. 911, 34 L. Ed. 2d 678.
It would seem that a legislature could reasonably make a distinction between a foster parent and those included in the statute as parties who may move to revoke commitment to the commissioner. A logical argument can be made that a foster parent, after having had a child in its care for some appreciable time, becomes a psychological parent and that its interest in the child is equal to that of a biological parent. A reasonable extension of this argument would also include any considerate neighbor or relative who has had a child for a period of time for one reason or another.
On the other hand, once a commitment has been made, foster parents and concerned relatives and neighbors generally act more on a temporary basis, with the legal guardianship of the child in another. Although in some instances a long-term placement may develop a close relationship between the foster parent and child, generally speaking, a foster parent acts more as a custodian awaiting either the return of the child to parents or the adoption of the child. Goldstein, Freud & Solnit, “Beyond the Best Interests of the Child,” p. 23. Furthermore, after a commitment under § 17-62 (d) to the welfare commissioner a foster parent derives custody from the commissioner’s placement. It is reasonable to *639include those who are legally responsible and biologically related to a child among those that have a statutory right to move to revoke the guardianship and custody of the commissioner and to exclude those who derive custody from the commissioner..
There is no error.
In this opinion House, C. J., and Barbee, J., concurred.
At the time of the proceedings in Juvenile Court, § 17-62 (a) provided: “Any selectman, town manager, or town, city, or borough welfare department, any probation officer, the Connecticut Humane Society, or the welfare commissioner, the commissioner of children and youth services or any other child-caring institution or agency approved by the welfare commissioner or, after April 1, 1975, the commissioner of children and youth services, having information that a child is neglected, uncared-for or dependent, may file with the juvenile court in the district where such ehild is resident a verified petition plainly stating such facts as bring the child within the jurisdiction of the court as neglected, uncared-for, within the meaning of section 17-53, or dependent, the name, date of birth, sex, and residence of the ehild, the name and residence of his parents or guardian, and praying for appropriate aetion by the court in conformity with the provisions of this chapter. . . .”
[General Statutes] Sec. 17-62 . . . . (d) Commitment to commissioners or private or public agency. Commissioner as guardian, placement. Upon finding and adjudging that any ehild is uncared-for, neglected or dependent, the eourt may commit him to the welfare commissioner, or, after April 1, 1975, to the commissioner of children and youth services, or may vest his care and personal custody in any private or public agency which is permitted by law to care for neglected, uncared-for or dependent children or with any person found to be suitable and worthy of such responsibility by the eourt. . . .”
“[General Statutes] Sec. 17-62. . . . (f) Revocation of commitment. Any court by which a ehild has been committed pursuant to the provisions of this section may, upon the application of a parent, including any person who acknowledges before said juvenile eourt paternity of a child born out of wedlock, or other relative of such child, the selectman or any original petitioner, or a licensed child-caring agency or institution approved by the commissioner, or said *634commissioner, and while such child is under the guardianship of said commissioner, upon hearing, after reasonable notice to said commissioner, and, if said commissioner made the application, after reasonable notice to such parent, relative, original petitioner, selectman or child-caring agency or institution, upon finding that cause for commitment no longer exists, revoke such commitment, and thereupon such guardianship and all control of said commissioner over such child shall terminate. Any such court may further revoke the commitment of any child upon application by the commissioner or by the child concerned and after reasonable notice to the parties affected upon a finding that such revocation will be for the best interest and welfare of such child. No hearing shall be held for such reopening and termination of commitment or transfer of commitment more often than once in six months, except upon the application of said commissioner.”
See, e.g., General Statutes §§ 17-320, 45-20, 46-1.