ELDRIDGE, Judge.
The petitioners are clinical social workers employed by the State of Maryland. The principal issues in the case are whether the State violated the Equal Protection Clause of the Fourteenth Amendment or Maryland Code (1957, 1988
Repl.Vol., 1990 Cum.Supp.), Art. 64A, § 27,
by paying the petitioners less than psychiatric nurses employed at the same facilities.
I.
The original claimants were twelve clinical social workers employed by the State of Maryland at Community Mental Health Centers administered by the Prince George’s County Health Department. These claimants filed an administrative grievance against the County Health Department and the State Department of Health and Mental Hygiene, alleging that the clinical social workers had the same responsibilities and performed essentially the same duties as psychiatric nurses at the Community Mental Health Clinics but were paid at a lower grade than the nurses.
They argued that under equal protection and due process principles, as well as under the State Merit System Law (Art. 64A), persons in positions involving comparable duties, experience, responsibilities and authority must be paid comparable salaries. The claimants requested that their salaries be upgraded to a level equivalent to that of the nurses and that they be awarded back pay.
After unsuccessfully pursuing their grievance through the initial steps of the State Employee Grievance Procedure,
Art. 64A, §§ 52-57, the claimants appealed to the Department of Personnel. At a hearing before the Department of Personnel hearing officer, there was testimony from clinical social workers, psychiatric nurses, and other personnel at the Prince George’s County Community Health Clinics. There was also testimony from other State-employed witnesses. Following the hearing, the Department of Personnel hearing officer issued her decision denying the grievance.
The hearing officer found that, at the Prince George’s County Community Mental Health Clinics, a clinical social worker “functions basically the same as the psychiatric nurses.” The hearing officer pointed to testimony that “cases are randomly assigned based on the availability of the therapist, who could be a psychiatric nurse, social worker or psychologist.” The hearing officer also referred to testimony that a psychiatric nurse at the Prince George’s County facilities spends only one percent of her time administering medication. The hearing officer, however, indicated that this situation was limited to Prince George’s County facilities and did not exist elsewhere in the State.
As part of her findings of fact, the hearing officer quoted extensively from a study commissioned in 1986 by the Appropriations Committee of the House of Delegates and conducted by the Department of Personnel’s Division of Salary Administration and Position Classification. The study focused on multi-disciplinary teams in use at Department of Health and Mental Hygiene facilities in order “to determine whether a single classification of Clinical Mental Health Therapist was appropriate for all persons performing clinical mental health therapy.” The study concluded that at facilities across the State, other than the Prince George’s County Mental Health Centers and the Regional Institute for Children and Adolescents in Rockville, Maryland, clinical social workers, psychiatric nurses, and psychologists “function[ed] within the boundaries of their discipline.” The hearing officer further quoted from the study:
“ ‘To the extent, then, that there is a commonality of function of the professionals in the mode of operation in the outpatient clinic and Regional Institute for Children and Adolescents, it is reflective of psychologists and nurses performing duties related to social services rather than reflection of social workers performing duties of nurses or psychologists, or reflective of functions (such as psychotherapy) which have been common to all these professionals.
“ ‘Under this circumstance, we do not recommend creating a single classification of Clinical Mental Health Therapist spanning all three professions. A new Clinical Social Worker classification may however be helpful in securing an applicant with background particularly relevant for clinical work as described above.’ ”
The Hearing Officer also noted: “In the expert opinion of the classification analysts, the social workers were not being overutilized or undercompensated; the psychologists and nurses were being underutilized and overcompensated.” The hearing officer stated that the Classification Study “in no way supports an additional salary adjustment for the” claimants.
The hearing officer concluded that “the grievants had the burden of proving that management violated a law or regulation or acted arbitrarily in denying a ... salary adjustment for the [claimants] to establish equity with the ... Nurse series,” and that the claimants had failed to meet their burden. The hearing officer also indicated that, to the extent that the claimants’ request for a salary adjustment might involve an amendment to the State Pay Plan under Art. 64A, § 27, such an amendment would relate to an
entire class and must be approved by the Governor.
The claimants then filed this action in the Circuit Court for Montgomery County to obtain judicial review of the Department of Personnel’s decision. Shortly thereafter, seven clinical social workers employed at the Regional Institute for Children and Adolescents in Rockville moved to intervene as additional plaintiffs, asserting that they were situated similarly to the original twelve plaintiffs. Over the objection of the defendants, the circuit court granted the motion to intervene.
The circuit court, after a hearing, reversed the Department of Personnel’s decision. The court ordered the Secretary of Personnel to reclassify the plaintiffs either to an existing or a new classification equivalent in salary to that of the psychiatric nurses. In addition, it was ordered that the plaintiffs be paid salaries equivalent to those of the Community Health Nurse IV classification, that the Secretary of Personnel consider awarding back pay, and that the defendants pay the plaintiffs’ attorney’s fees. The circuit court issued no written opinion, and the remarks of the circuit judge at the hearing do not make the basis for his ruling entirely clear. It would appear from his remarks that the circuit judge agreed with the plaintiffs’ equal protection argument.
The Prince George’s County Department of Health and the State Department of Health and Mental Hygiene filed an appeal, and the Court of Special Appeals reversed.
Prince George’s County v. Briscoe,
79 Md.App. 325, 556 A.2d 742 (1989). In response to petitioners’ constitutional
arguments, the intermediate appellate court held that the difference in pay scale between the social workers and the nurses had a rational basis and, therefore, did not constitute a denial of equal protection or of due process. With regard to the plaintiffs’ reliance upon the provision of Art. 64A, § 27(a)(l)(i), stating that “all positions in the service involving comparable skills, knowledge, effort, responsibility, and working conditions shall be paid comparable salaries,” the Court of Special Appeals initially indicated that this provision is part of the section relating to the State Pay Plan. The appellate court then held that the Pay Plan related to statewide classes and not individual positions, that any changes in the Pay Plan must be approved by the Governor, and that the hearing officer had no power to effect a modification in the Pay Plan. As to the plaintiffs’ reliance upon Art. 64A, § 16(b), which authorizes the Secretary of Personnel to take corrective action when a position is inappropriately classified, the Court of Special Appeals held that plaintiffs had failed to argue at the administrative level that they were entitled to reclassification under § 16(b).
The
appellate court alternatively held that the plaintiffs had not shown at the administrative hearing that they had been misclassified or that they should be reclassified. Lastly, the Court of Special Appeals held that permitting the intervention of the Rockville social workers had been improper because they had failed to exhaust their administrative remedies, and that the award of attorney’s fees to the plaintiffs had been erroneous.
Thereafter, we granted the plaintiffs’ petition for a writ of certiorari.
II.
The plaintiffs’ principal argument in this Court is that the State’s classification scheme which pays clinical social workers such as the plaintiffs less than psychiatric nurses constitutes a denial of the Equal Protection Clause of the Fourteenth Amendment.
In a case such as this, the standard of review for equal protection analysis is the rational basis test.
See, e.g., Hargrove v. Board of Trustees,
310 Md. 406, 416-422, 529 A.2d 1372, 1377-1380 (1987),
cert. denied,
484 U.S. 1027, 108 S.Ct. 753, 98 L.Ed.2d 766 (1988);
Broadwater v. State,
306 Md. 597, 604-608, 510 A.2d 583, 586-588 (1986);
Ennis v. State,
306 Md. 579, 595, 510 A.2d 573, 581 (1986);
Attor
ney General v. Waldron,
289 Md. 683, 706-707, 426 A.2d 929, 942 (1981);
Board v. Goodsell,
284 Md. 279, 286, 396 A.2d 1033, 1037 (1979);
Governor of Maryland v. Exxon Corp.,
279 Md. 410, 439, 370 A.2d 1102, 1118 (1977),
aff'd,
437 U.S. 117, 98 S.Ct. 2207, 57 L.Ed.2d 91 (1978). The plaintiffs, in fact, concede that the rational basis test is appropriate here.
As we have stated, “[a] statutory classification tested by the rational basis standard enjoys a strong presumption of constitutionality and a reasonable doubt as to its constitutionality is sufficient to sustain it.”
State v. Good Samaritan Hospital,
299 Md. 310, 328, 473 A.2d 892, 901,
appeal dismissed,
469 U.S. 802, 105 S.Ct. 56, 83 L.Ed.2d 7 (1984).
See, e.g., Hargrove v. Board of Trustees, supra,
310 Md. at 423, 529 A.2d at 1380;
Whiting-Turner Contracting Co. v. Coupard,
304 Md. 340, 352, 499 A.2d 178, 185 (1985);
Board v. Goodsell, supra,
284 Md. at 286, 396 A.2d at 1037. The rational basis test was summarized in
Attorney General v. Waldron, supra,
289 Md. at 707, 426 A.2d at 942, as follows:
“Using [the rational basis] approach, a statutory classification is struck down, in the oft-expressed words of the Supreme Court, only if the means chosen by the legislative body are ‘wholly irrelevant to the achievement of the State’s objective.’
McGowan v. Maryland,
366 U.S. 420, 425, 81 S.Ct. 1101 [1105], 6 L.Ed.2d 393 (1961);
McDonald v. Board of Election,
394 U.S. 802, 809, 89 S.Ct. 1404 [1408-09], 22 L.Ed.2d 739 (1969). The Supreme Court, in applying this test, has been willing to uphold the constitutionality of an enactment when ‘any state of facts reasonably, may be conceived to justify it.’
McGowan v. Maryland, supra
at 426 [1105]. See
Holt Civic Club v. City of Tuscaloosa,
439 U.S. 60, 99 S.Ct. 383, 58 L.Ed.2d 292 (1978);
Kotch v. Pilot Comm’rs,
330 U.S. 552, 67 S.Ct. 910, 91 L.Ed. 1093 (1947). This deferential review of state legislative classifications operates, at least in the sphere of economic regulation, ‘quite apart from whether the conceivable “state of facts” (1) actually exists, (2)
would convincingly justify the classification if it did exist, or (3) has ever been urged in the classification’s defense by those who either promulgated it or have argued in its support.’ ”
See also United Wire v. State Deposit Ins. Fund,
307 Md. 148, 158-159, 512 A.2d 1047, 1052 (1986);
Department of Transportation v. Armacost,
299 Md. 392, 412-413, 474 A.2d 191, 201 (1984);
Board v. Goodsell, supra,
284 Md. at 286, 396 A.2d at 1037;
Governor of Maryland v. Exxon Corp., supra,
279 Md. at 439, 370 A.2d at 1118;
Bowie Inn v. City of Bowie,
274 Md. 230, 241, 335 A.2d 679, 686 (1975).
Furthermore, “[t]he test is not whether the statute, as applied to the individual plaintiff, relates to a legitimate governmental interest, but rather whether the classification created by the statute which encompasses the plaintiff is so related.”
Peed v. Cleland,
516 F.Supp. 469, 476 (D.Md.1981). Legislation which creates different classes of public employees, and treats each class differently, does not violate the Equal Protection Clause unless “the classification rests on grounds wholly irrelevant to the achievement of the State’s objective.”
Montgomery County v. Walsh,
274 Md. 502, 525, 336 A.2d 97, 111-112 (1975),
appeal dismissed,
424 U.S. 901, 96 S.Ct. 1091, 47 L.Ed.2d 306 (1976).
See Abbott v. Administrative Hearing Bd.,
33 Md.App. 681, 688, 366 A.2d 756, 760 (1976),
cert. denied,
280 Md. 727 (1977).
Turning to the present case, it is clear that there is a rational basis for the classification drawn by the State between the psychiatric nurses and the clinical social workers. Thus, the classification does not violate equal protection principles.
As the Department of Personnel hearing officer noted, the Appropriations Committee of the Maryland House of Delegates commissioned a study to evaluate the validity of the distinctions drawn between clinical social workers and psychiatric nurses. The study concluded that: (1) except in the facilities at issue, psychiatric nurses and
clinical social workers in in-patient facilities across the state functioned within the characteristics of their job classifications; (2) psychologists and psychiatric nurses at the Prince George’s Mental Health Clinics and the Regional Institute for Children and Adolescents were performing social services tasks; (3) clinical social workers at these facilities were not performing tasks unique to the psychiatric nurse or psychologist classification; and (4) clinical social workers at the facilities at issue were not being overutilized or underpaid, but, rather, psychologists and psychiatric nurses were being underutilized and overpaid.
State employee classifications have traditionally been drawn on a state-wide basis. Moreover, in
Ball v. Board of Trustees of State Colleges,
251 Md. 685, 691, 248 A.2d 650, 653-654 (1968), this Court held that the “classes” and “classifications” contemplated by Art. 64A mean a “statewide classified service system” which is the same whether the employment is “performed at Morgan State College, Frostburg State College, the Maryland House of Correction or elsewhere.” The record in this case clearly shows that clinical social workers and psychiatric nurses generally perform different functions in facilities across the State. The fact that in one county, and in one facility in another county, the psychiatric nurses perform basically the same functions as clinical social workers does not deprive the classification of a rational basis.
Additionally, clinical social workers and psychiatric nurses have different qualifications. Because the nurses are qualified to perform patient care services, the State legitimately may value their services more highly. Assuming that the psychiatric nurses and clinical social workers at the Prince George’s County Mental health centers and the Regional Institute for Children and Adolescents primarily perform psychotherapy, the nurses are still capable of, and occasionally do perform, other patient care services. The clinical social workers are not able to evaluate patients physically or to administer medication as the nurses are. Also, while the plaintiffs emphasize that a Master’s Degree
is required for all social workers while only a Bachelor’s Degree is required for the psychiatric nurses, this statement is not entirely accurate. Several levels within the nurse classification also require a Master’s Degree.
Article 64A, § 27(a), requires only that comparable salaries be paid “in accordance with the relative value of the services to be performed.” In light of the difference in the ability to provide patient care, and the conclusions of the 1986 Department of Personnel study, the State had a rational basis for differentiating between the psychiatric nurses and the clinical social workers. The State could reasonably conclude that the value of the services performed by the nurses was greater.
The plaintiffs cite several cases in support of their equal protection argument. The first is
Wood v.
Mills, 528 F.2d 321 (4th Cir.1975). The
Wood
case provides no support for the plaintiffs’ position in the case at bar. In
Wood,
prison matrons, who possessed the same qualifications and performed the same tasks as their male counterparts, were being paid at a lower scale. This was found to be unconstitutional sex discrimination. Although sex has not been deemed a suspect classification under the Equal Protection Clause of the Fourteenth Amendment, the Supreme Court has stated that it is to be subject to heightened scrutiny.
Craig v. Boren,
429 U.S. 190, 197-199, 97 S.Ct. 451, 457-458, 50 L.Ed.2d 397 (1976).
See Stanton v. Stanton,
421 U.S. 7, 13-18, 95 S.Ct. 1373, 1377-1379, 43 L.Ed.2d 688 (1975);
Weinberger v. Wiesenfeld,
420 U.S. 636, 648, 95 S.Ct. 1225, 1233, 43 L.Ed.2d 514 (1975);
Reed v. Reed,
404 U.S. 71, 92 S.Ct. 251, 30 L.Ed.2d 225 (1971);
Eslinger v. Thomas,
476 F.2d 225, 230-231 (4th Cir.1973). The rational basis test is not applicable in such cases. Moreover, the State is much less likely to have a valid justification for discriminating on the basis of sex than it does in differentiating between classes of State employees based on different
occupations.
The plaintiffs also rely upon two New York cases,
Weissman v. Evans,
56 N.Y.2d 458, 452 N.Y.S.2d 864, 438 N.E.2d 397 (1982), and
Weissman v. Bellacosa,
129 A.D.2d 189, 517 N.Y.S.2d 734 (1987), which concerned enactments by the New York legislature classifying judges as state employees. The result was that the salaries of the judges would be set by the state. Previously, judges had been paid by the localities where they presided, resulting in salary discrepancies among judges performing the same work. After the passage of the new statutes, the state created a salary scale which incorporated the preexisting inequalities in salary. The judges who were adversely affected brought suit, claiming that the salary scale constituted a denial of equal protection. The New York courts agreed, stating that there was no rational basis for paying different salaries to judges who were equally qualified, performed the same work, and presided in counties with similar conditions. The New York judges were members of the same profession and performed the same functions. In the present case, however, social workers and nurses are not members of the same profession. In addition, they generally do not perform the same functions.
The plaintiffs also cite
State ex rel. Longanacre v. Crabtree,
350 S.E.2d 760 (W.Va.1986). The facts in that case were that the State of West Virginia had set a salary scale for magistrates based on the population size of the county served by the magistrate. The law, however, made an exception for five counties and expressly set the salaries in those counties at a specific rate. Magistrates in counties with populations similar to those of the excepted counties,
who were being paid at a lower rate, argued that this scheme violated equal protection principles. Using a rational basis analysis, the Supreme Court of West Virginia agreed.
As in the New York cases,
Crabtree
involved the payment of different salaries to members of the same profession, performing the same duties. That is not the situation presented by the case at bar.
For the reasons set forth above, we agree with the Court of Special Appeals that the plaintiffs were not denied equal protection of the laws.
The plaintiffs also claim that the difference in classification between the clinical social workers and psychiatric nurses “is a violation of their right to substantive due process.” This argument is based on an asserted lack of a rational basis for the classification, and it is identical to the plaintiffs’ equal protection argument. Consequently, we need not address the argument separately. We reject it for the same reasons.
III.
We now turn to the plaintiffs’ argument that, under Art. 64A, they were entitled to be reclassified and that the hearing officer erred in failing to reclassify them.
Preliminarily, we agree with the hearing officer and the Court of Special Appeals that, to the extent that the relief being sought by the plaintiffs involves an amendment to the State Pay Plan under Art. 64A, § 27, such relief cannot be obtained through the grievance procedure. The actions of the Secretary of Personnel under § 27 are subject to the approval of the Governor.
On the other hand, the general principle set forth in § 27, that positions of “comparable duties, experience, responsi
bilities and authority shall be paid comparable salaries,” enunciates a public policy that the Department of Personnel has applied in grievance proceedings. The principle has been used by the Department of Personnel as a basis for determining, in a grievance proceeding, that certain positions had been misclassified and should be reclassified.
See, e.g., Frosburg v. State Dep’t of Personnel,
37 Md.App. 18, 375 A.2d 582,
cert. denied,
281 Md. 737
(1977); Drivers License Reviewers,
Grievance Cases # G-225 and G-475 (September 4, 1975);
Donald M. Ayers,
Grievance Case # G-2210 (September 25, 1981). This was fully understood by the hearing officer in the present case who denied the plaintiffs’ grievance on its merits. Moreover, we disagree with the Court of Special Appeals concerning what the plaintiffs raised before the hearing officer. We believe that the plaintiffs in substance fully raised the matter of misclassification and reclassification pursuant to Art. 64A, §§ 16(b) and 54(c) and (d).
The plaintiffs do not contend that any factual finding of the hearing officer in this case was arbitrary or unsupported by substantial evidence. Instead, their argument is that the undisputed evidence before the hearing officer showed that the State has violated the principle contained in Art. 64A, § 27, providing that positions of comparable duties, experience, responsibilities and authority shall be paid comparable salaries. According to the plaintiffs, the hearing officer’s conclusion that this principle was not violated constituted an error of law.
The entire factual basis for the plaintiffs’ State law argument is the same as the foundation for their equal protection argument, namely that at the Prince George’s County and Rockville facilities the clinical social workers and the psychiatric nurses basically perform the same functions.
Consequently, for the same reasons delineated in Part II above, the hearing officer was warranted in concluding that the plaintiffs’ pay was not in violation of the comparability
principle embodied in Art. 64A. The positions of clinical social workers and psychiatric nurses involve different professions with different qualifications. The nurses have the capability of performing functions which the social workers cannot perform should the need arise. Moreover, merit system classifications are on a statewide basis, and generally throughout the State clinical social workers and psychiatric nurses do not perform the same functions or duties. Finally, the evidence supports the conclusion that, in Prince George’s County and Rockville, the psychiatric nurses are being overpaid rather than the clinical social workers being underpaid. In light of these factors, a reviewing court could not reasonably conclude that the Department of Personnel’s decision was erroneous as a matter of law.
JUDGMENT OF THE COURT OF SPECIAL APPEALS AFFIRMED EXCEPT AS IT RELATES TO THE CIRCUIT COURT’S ORDER PERMITTING INTERVENTION. CASE REMANDED TO THE COURT OF SPECIAL APPEALS FOR MODIFICATION OF ITS JUDGMENT INSOFAR AS IT REVERSES THE ORDER PERMITTING INTERVENTION. PETITIONERS TO PAY COSTS.