BELL, Chief Judge.
James M. Giffin, the petitioner, and Donna L. (Valtri) Crane, the respondent, the parents of two daughters, Emily Stoughton, born December 22nd, 1982, and Sarah Ellen, born June 26th, 1988, separated in May, 1992, after more than 12 years of marriage. At separation, the petitioner and the parties’ two daughters remained in the marital home, while the respondent lived nearby and maintained regular visitation with the children. A year later, the respondent moved to Louisville, Kentucky.
Both parties sought to obtain a divorce. The petitioner filed his complaint for an absolute divorce first, in the Circuit Court for Montgomery County, alleging voluntary separation in excess of one year, or, in the alternative, separation for more than two years. The respondent countered by filing her complaint for divorce on the grounds of voluntary separation in excess of one year. The petitioner and the respondent both asked for custody of the two children, child support, and attorney’s fees. The custody and visitation issues were resolved by the parties when they entered into, and placed on the record, a written agreement, “intended to resolve all issues between the parties as to the custody of their children, but to leave to the court decision on the issue of child support and attorney’s fees.”1 In addition to maintaining the status quo with respect to the petitioner’s being the children’s custo[136]*136dian—the petitioner had sole physical custody of both minor children—the agreement provided for joint legal custody. The agreement also contained detailed and comprehensive provisions concerning the respondent’s visitation with the children.
The agreement contemplated the possibility of annual reviews of the residential status of the children, to be conducted, at the requesting party’s expense, by a mental health professional as to whom the parties agreed. With respect to such reviews, § 1.4 of the agreement thus provided:
[137]*137“Either party shall have the right at his or her expense after contribution by all available insurance to request a comprehensive review of the residential status of the children by Dr. Mary Donahue or another mental health professional agreed by the parties. The purpose of this review will be determined by Dr. Donahue’s using professional standards and her discretion. It is anticipated by the husband that as part of this review Dr. Donahue will consult with teachers and others who have knowledge of the children and their needs. The parties agree that Dr. Donahue will meet with the children within 30 days after the signing of this agreement so as to have a basis of information and that she may make inquiry of the court appointed attorney or others as she sees fit. The parties shall divide the uninsured costs of the first meetings within 30 days.
“The wife desires that Dr. Donahue conduct a review of the children’s residential status in 1995. The parties agree that thereafter each will be entitled to request such a review on not more than an annual basis; the parent requesting the review shall be responsible for the payment therefor.”
The respondent, having indicated in the agreement her desire that Dr. Mary Donahue conduct such a review, Dr. Donahue proceeded to do so. As a result of her investigation, Dr. Donahue recommended that physical custody of the children be changed from the petitioner to the respondent.2
[138]*138By the time Dr. Donahue had completed her investigation and communicated her recommendation, the court had resolved all the outstanding issues, ordering the respondent to pay child support, declining to award the petitioner attorney’s fees, and granting the petitioner a divorce.3 When the petitioner refused to accept Dr. Donahue’s recommendation and relinquish custody of the children, the respondent filed a petition for modification of custody and child support.
[139]*139A hearing was held on the respondent’s motion, during which the court, over a span of six days, received testimony from more than twenty witnesses and viewed a number of exhibits, including private investigators’ reports and a videotape. At that hearing, the interests of the children were represented by an attorney appointed by the court.4 The court granted the respondent’s Petition for Modification of Residential Custody, thus modifying the custody agreement by transferring custody of the children from their father to their mother. The court explained its decision as follows:
“The record will reflect in this case what we are about, and what we are about is the issue of custody insofar as residence of the children [is] concerned.
“Now, this was brought about and applied because as a result of an agreement that was made between the parties. There has not been raised in this case nor is there an issue relative to joint custody.
“The evidence in this case exemplifies to the court that both parents are able to communicate with each other concerning the important matters concerning the welfare of the children, and this Court believes they will continue to do so; so joint legal custody is not an issue, and the children remain under that cloak, that there is joint legal custody with both parents over both of the children.
“Now the issue returns as to whether or not there should be a change in the physical custody of the children. This Court feels that the—this concept is governed under Maryland law, that—by the best interest of the child or children, and whether or not there is any material change to circumstances.
“Now, there is no question again in this case that both parents are caring parents, loving parents. There is no doubt by looking at the record that the father, with whom [140]*140the children have resided this past period of time, is a parent who can attend to all of their physical needs relevant to growing up in a healthy physical situation.
“The Court gleans from its interview with the two children, in addition to what it communicated before and didn’t withhold this, but it comes to mind now, that these two very well oriented, adjusted children, who accept the circumstances under which they are living, and also accept that they are loved and cared for by both parents in different ways relative to physical arrangements.
“These children, by no stretch of the imagination, imagine that if they would remain with the father or move to the mother’s residence that one parent or the other would gloat over this situation, would consider themselves a winner or a loser, but feel absolutely certain in the love and affection and care that they are entitled to by each parent, and I hope that each parent understands this and abides by those things that these children believe in.
“Sometimes out of the [mouths] of children the wisest things are said. It is interesting that the issue of the young adulthood of Emily in this case did come to the fore. It is also interesting that at the same time Emily expressed the conclusion that she was more able to communicate with her mother. She did not enlarge upon that to me, and there has been no testimony as to what exactly she meant or what specifically she meant insofar as communication, but the Court gleans from, this and the testimony from at least one expert in this case relative to a girl child having particular need for her mother has seemed to come to the fore and is a necessary factor in my determinations in this case.
“Sarah and Emily have a tremendous bond and should by no stretch of the imagination be separated at all during this time of their life.
“The Court feels that the best interests of the children and the material change of circumstances, as exemplified by the reaching an age where Emily at the very least exemplifies a need for a female hand, causes the Court to come to the
[141]*141
conclusion that the children should reside with their mother.
“It is interesting that these children would benefit by the influence of their father’s fiancee. It is interesting that the Court feels they will benefit from the influence of the husband of the birth mother.
“The children indicate that they adjust and get along well with the children of the husband of their mother and that they could get along with almost anybody.
“The decision of the Court, therefore, is the best interest of the children having expressed what it considers to be a material change of circumstances indicate that the physical custody of the children will be with the mother at this time, that to begin at the end of the school year.
“I would also order and hope that the parties will be able to reach the appropriate agreement, that there be a continuing contact and visitation with the father and that it be extensive as it has been exemplified by that contact with the mother.
“If there are any financial matters that have to be decided, the Court refers those matters to the domestic relations master.” (Emphasis added).
The petitioner appealed the judgment to the Court of Special Appeals. He argued in that court that the trial court erred by considering the sex of the parents as a factor in its determination of custody. In an unreported opinion, the intermediate appellate court held, inter alia, that “[t]he consideration of gender was a valid consideration in determining residential custody in this case.”
In response, the petitioner filed a petition for a writ of certiorari, which this Court granted. In this Court, the petitioner argues, citing Maryland statutory and case law, as well as the Maryland Constitution, that the sex of the parent is not a legitimate consideration in child custody cases. The respondent espouses the opposing view; she argues that the cases upon which the petitioner relies, in particular Elza v. Elza, 300 Md. 51, 475 A.2d 1180 (1984), does not “completely eliminate any consideration of gender.” Those cases, she [142]*142submits, simply upheld the abolition of the maternal preference, consistent with the 1974 amendment to Maryland Code (1957, 1984 Replacement Volume) Art. 72A § 1;5 they did not preclude the consideration of appropriate biological and psychological differences between parents. Indeed, the respondent asserts that the Court in Elza recognized that gender was an appropriate consideration when, after abolishing the maternal preference, it commented:
“On remand, the chancellor shall explicate more fully the reasons for his decision. In evaluating what would be in the [143]*143child’s best interests, the chancellor shall consider, among other factors, Shannon’s needs, the relationship of each of her parents to her, and the effect of the biological as well as psychological differences between her parents on her welfare. Given that additional information will undoubtedly be available to the chancellor when he again presides over this custody proceeding, we express no opinion concerning the ultimate resolution of this controversy.”
Elza, 300 Md. at 60, 475 A.2d at 1185. Finally, the respondent maintains that, even if using sex as a determining factor is not appropriate, the trial court still came to the correct decision when it awarded custody to the mother and, thus, the judgment of the Court of Special Appeals should be affirmed.6
I
The question that we must decide is whether, in a child custody proceeding, the sex of either parent is a legitimate and proper consideration in determining which of them is the appropriate residential custodian. It is an issue in this case because of some of the language the trial court used to explain its custody decision. As we have seen, the court opined:
“[T]he Court gleans from ... the testimony from at least one expert in this case relative to a girl child having particular need for her mother has seemed to come to the fore and is a necessary factor in my determinations in this case ... The Court feels that the best interests of the children ... as exemplified by the reaching an age where Emily at the very least exemplifies a need for a female [144]*144hand, causes the Court to come to the conclusion that the children should reside with their mother.”
The expert to whom the trial court apparently was referring, Dr. Joseph Poirier, expert witness for the petitioner, when questioned by the children’s counsel, testified as follows.
“Q: In comparison, mother was much warmer, I think you testified to?
“A: In [Emily’s] perception, yes.
“Q: Okay.
“A: Now, again, that may be of that mother/daughter attachment thing, too. I mean, I did not find Mr. Giffin emotionally detached.
* * * * *
“Q: And that is because [Emily] perceives him as being more emotionally aloof, to use those same words?
“A: I would not characterize it that way. I could not tell you if [Emily] is more comfortable with the mom. That may be explainable just in terms of that specialized relationship she has. You know, I mean, If I can look at my own kids, when my kids were adolescents, they were much more comfortable going to my wife. There is a developmental thing there and it’s not really necessarily a positive or a negative characterization against or on behalf of either parenting figure.
“Q: But the literature clearly recognizes the significance of that developmental factor that you were just talking about—
“A: Oh, yes.
“Q: —and the identification with the same sex parent is pretty common with someone this age; correct?
“A: And again, as I have already testified, it is something that ebbs and flows, yes.”
The determination of which parent should be awarded custody of a minor child rests within the sound discretion of the trial court. Robinson v. Robinson, 328 Md. 507, 513, 615 A.2d 1190, 1193 (1992); In re Jessica M., 312 Md. 93, 110, 538 [145]*145A.2d 305, 313 (1988); Davis v. Davis 280 Md. 119, 372 A.2d 231, cert. denied, 434 U.S. 939, 98 S.Ct. 430, 54 L.Ed.2d 299 (1977); Ross v. Hoffman, 280 Md. 172, 185, 372 A.2d 582, 590-91 (1977). The court’s exercise of discretion must be guided first, and foremost, by what it believes would promote the child’s best interest, which, in custody disputes, is of transcendent importance. Elza, 300 Md. at 60, 475 A.2d at 1183. See Kemp v. Kemp, 287 Md. 165, 170, 411 A.2d 1028, 1031 (1980); Stancill v. Stancill, 286 Md. 530, 534, 408 A.2d 1030, 1033 (1979); Ross, 280 Md. at 174-75, 372 A.2d at 585; Krebs v. Krebs, 255 Md. 264, 266, 257 A.2d 428, 429 (1969); see generally, Montgomery County Department of Social Services et al. v. Sanders, 38 Md.App. 406, 381 A.2d 1154 (1977). Determining what is in the best interest of the child is by no means easy. As Chief Judge Gilbert speaking for the Court of Special Appeals in Sanders recognized, “there is no such thing as a simple custody case.” Id. at 414, 381 A.2d at 1160. He further pointed out in that same case:
“Unfortunately, there is no litmus paper test that provides a quick and relatively easy answer to custody matters. Present methods for determining a child’s best interest are time-consuming, involve a multitude of intangible factors that ofttimes are ambiguous. The best interest standard is an amorphous notion, varying with each individual case, and resulting in its being open to attack as little more than judicial prognostication. The fact finder is called upon to evaluate the child’s life chances in each of the homes competing for custody and then to predict with whom the child will be better off in the future. At the bottom line, what is in the child’s best interest equals the fact finder’s best guess.”
Id. at 419, 381 A.2d at 1163. See also Domingues v. Johnson, 323 Md. 486, 501, 593 A.2d 1133, 1140 (1991) (“Indeed, the very difficulty of the decision-making process in custody cases flows in large part from the uniqueness of each case, the extraordinarily broad spectrum of facts that may have to be considered in any given case, and the inherent difficulty of formulating bright-line rules of universal applicability in this [146]*146area of the law.”). Moreover, there are many factors, to be taken as a whole, that the court must consider when gauging what is in a child’s best interest. See Sanders, 38 Md.App. at 420, 381 A.2d at 1163. See also Palmore v. Sidoti, 466 U.S. 429, 432-33, 104 S.Ct. 1879, 1881-82, 80 L.Ed.2d 421, 425 (1984). Both before and after 1972, when Maryland adopted the Equal Rights Amendment, this Court, as the respondent notes, has listed among the factors to be considered the age, health and sex of the child. See Hild v. Hild, 221 Md. 349, 357, 157 A.2d 442, 446 (1960) and Queen v. Queen, 308 Md. 574, 587-88, 521 A.2d 320, 327 (1987). In addition, in Elza, this Court recognized that “biological and psychological differences between parents” may be considered in determining the best interest of children for custody purposes. 300 Md. at 59, 475 A.2d at 1184.
As a threshold matter, the issue must be addressed as to whether the trial court did, in fact, consider gender as a determining factor in its custody decision. To be sure, the court, on this record, could have resolved the custody issue on a basis other than gender. It is conceivable, in fact, that the communication issue may have been decisive. Indeed, that appears to be the position taken by the children’s counsel. The record in this case belies that position, however.
After acknowledging the test for determining the custody of the children, the trial court recognized that “both parents are caring parents, loving parents.” It also found that “[tjhere is no doubt ... that the father, with whom the children have resided this past period of time, is a parent who can attend to all of their physical needs relevant to growing up in a healthy physical situation.” Focusing on the fact that Emily informed the court that she could more easily communicate with her mother, but admitting that she did not further elaborate and that there was no testimony as to the full significance of that fact, the trial court concluded, based on the testimony of one of the expert witnesses, that Emily was “a girl child having a particular need for her mother.” Explaining why that factor was a necessary one in its determination, the court stated that “the reaching an age where Emily at the very least exempli[147]*147fies a need for a female hand,” thus, concluding that the need for a female hand constitutes a material change in circumstances, which should precipitate awarding custody to the respondent.
When one considers the trial court’s explanation of its decision, it is clear, unambiguously so, that the court was relying on the respondent’s gender as the decisive basis for modifying the custody order. While the ability to communicate better with one parent over the other may be cause to award custody to that parent, that is not what occurred in this case and it is certainly not what the trial court said that it was doing. With no more information than that Emily indicated an ability more easily to communicate with her mother and despite the outstanding job that the court acknowledged that the petitioner had done in raising his daughters, the trial court was persuaded by the testimony of one of the experts that she was a girl child who has a particular need for her mother and for a female hand. Because, as the court itself acknowledged, there was no specific or particularized testimony or information concerning the nature of the communication problem, its conclusion could not have been the product of testimony about the particular child and her needs and relationship with the parties. As the petitioner points out, citing McAndrew v. McAndrew, 39 Md.App. 1, 9, 382 A.2d 1081, 1086 (1978):
“The Chancellor did not conduct an individualized examination of the evidence or speak in terms of specific facts. He did not describe specific characteristics that these children needed in a custodial parent, he merely said a girl needs her mother. He did not describe specific attributes he saw in the Appellee or explain why he thought that she could better meet the needs of the children, except that she has ‘a female hand.’ In short, he ‘presumed [appellee] to be clothed with ... a particular characteristic merely because [she] is ... female.’ ”
The petitioner also cites to Md.Code (1957, 1991 Repl.Vol., 1997 Supp.) § 5-203 of the Family Law Article, and to the Equal Rights Amendment for support of his position.
[148]*148Maryland’s Equal Rights Amendment, Article 46 of the Maryland Declaration of Rights, provides: “Equality of rights under the law shall not be abridged or denied because of sex.” This article was ratified by the electorate at the general election held on November 7, 1972. To ascertain the mandate of this constitutional amendment, we look first to the “natural and ordinary signification” of its language. Rand v. Rand, 280 Md. 508, 511-12, 374 A.2d 900, 902 (1977), quoting Balto. Gas & Elect Co. v. Board, 278 Md. 26, 358 A.2d 241 (1976). If that language is clear and unambiguous, we need not look elsewhere. Rand, 280 Md. at 511, 374 A.2d at 902, citing Harden v. Mass Transit Adm., 277 Md. 399, 354 A.2d 817 (1976); Md.-Nat’l Cap. P. & P. v. Rockville, 272 Md. 550, 325 A.2d 748 (1974). The words of the Equal Rights Amendment are clear, unambiguous and unequivocal; the Amendment “mandated equality of rights under the law and rendered state-sanctioned sex-based classifications suspect.” State v. Burning Tree Club, Inc., 315 Md. 254, 269, 554 A.2d 366, 374, cert. denied, 493 U.S. 816, 110 S.Ct. 66, 107 L.Ed.2d 33 (1989). We also said in that case:
“Plainly, under prior holdings of this Court, state action providing for segregation based upon sex, absent substantial justification, violates the E.R.A., just as segregation based upon race violates the Fourteenth Amendment.”
Id. at 295, 554 A.2d 366, citing Burning Tree Club v. Bainum, 305 Md. 53, 95-98, 501 A.2d 817 (1985) (Eldridge, J. concurring and dissenting). Indeed, this Court has opined that the Amendment can only mean that sex is not, and can not be, a factor in the enjoyment or the determination of legal rights. Rand, 280 Md. at 513, 374 A.2d at 902-03, citing Brown, Emerson, Falk, and Freedman, The Equal Rights Amendment: A Constitutional Basis for Equal Rights for Women, 80 Yale L.J. 871 (1971).
The basic principle of the Maryland Equal Rights Amendment, thus, is that sex is not a permissible factor in determining the legal rights of women, or men, so that the treatment of any person by the law may not be based upon the circumstance that such person is of one sex or the other, [149]*149Burning Tree Club v. Bainum, 305 Md. 53, 64, 501 A.2d 817, 822, (Murphy, C.J.), citing 80 Yale L.J. 871, 889 (1971); that amendment generally invalidates governmental action which imposes a burden on, or grants a benefit to, one sex but not the other one. Id. at 70, 501 A.2d at 825 (Murphy, C.J.). Therefore, Chief Judge Murphy noted in Burning Tree Club v. Bainum, that this constitutional provision drastically altered traditional views of the validity of sex-based classifications imposed under the law, and was cogent evidence that the people of Maryland were fully committed to equal rights for men and women. Id. at 64, 501 A.2d at 822 (Murphy, C.J.). And the equality between the sexes demanded by the Maryland Equal Rights Amendment focuses on “rights” of individuals “under the law,” which encompasses all forms of privileges, immunities, benefits and responsibilities of citizens. Id. at 70, 501 A.2d at 825, (Murphy, C.J.), quoting 80 Yale L.J. at 908. As to these, the Maryland E.R.A. absolutely forbids the determination of such “rights,” as may be accorded by law, solely on the basis of one’s sex, i.e., sex is an impermissible factor in making any such determination. See Rand v. Rand, 280 Md. at 513, 374 A.2d at 903, Kline v. Ansell, 287 Md. 585, 593, 414 A.2d 929, 932 (1980); Turner v. State, 299 Md. 565, 574, 474 A.2d 1297, 1302 (1984). It was in this context that the Chief Judge Murphy opinion in Burning Tree Club v. Bainum observed that the Equal Rights Amendment’s guarantee of equality of rights under the law “can only mean that sex is not a factor.” 305 Md. at 64, 501 A.2d at 822 (Murphy, C.J.), citing Rand, 280 Md. at 512, 374 A.2d at 903.
It is clear, therefore, that the Equal Rights Amendment flatly prohibits gender-based classifications, absent substantial justification, whether contained in legislative enactments, governmental policies, or by application of common law rules. See State v.Burning Tree Club, 315 Md. at 295-96, 554 A.2d at 386-87; Rand, supra, 280 Md. at 516, 374 A.2d at 900; Condore v. Prince George’s Co., 289 Md. 516, 425 A.2d 1011 (1981); Turner, 299 Md. at 574, 474 A.2d at 1302. Other jurisdictions have reached the same conclusion. For instance, [150]*150in Williams v. School District, 998 F.2d 168, the United States Court of Appeals, for the Third Circuit, pointed out that
“[t]he Pennsylvania E.R.A. provides that ‘[ejquality of rights under the law shall not be denied or abridged in the Commonwealth of Pennsylvania because of the sex of the individual.’ The provision applies equally to men and to women, and, according to the Supreme Court of Pennsylvania, its purpose is to insure equality of rights under the law and to eliminate sex as a basis for distinction. The sex of citizens of this Commonwealth is no longer a permissible factor in the determination of their legal rights and legal responsibilities. The law will not impose different benefits or different burdens upon the members of a society based on the fact that they may be man or woman. In this Commonwealth, sex may no longer be accepted as an exclusive classifying tool.”
Id. at 177, citing Henderson v. Henderson, 458 Pa. 97, 327 A.2d 60, 62 (1974) (invalidating statute permitting only women to receive alimony after divorce); Swidzinski v. Schultz, 342 Pa.Super. 422, 493 A.2d 93, 95-96 (1985); Commonwealth v. Butler, 458 Pa. 289, 328 A.2d 851, 855 (1974) (invalidating criminal statute prohibiting minimum sentences for women while allowing them for men); Hartford Accident & Indem. Co. v. Insurance Comm’r, 505 Pa. 571, 482 A.2d 542 (1984) (striking differential insurance rates for the sexes); Commonwealth v. Santiago, 462 Pa. 216, 340 A.2d 440 (1975) (invalidating presumption that wife who commits crime in the presence of her husband was coerced); Hopkins v. Blanco, 457 Pa. 90, 320 A.2d 139 (1974) (extending to married women the right to claim damages for loss of consortium). See Pa. Const. Art. I, § 28. See also Schreiner v. Fruit, 519 P.2d 462 (Alaska 1974) ( to grant men but not women the right to sue for loss of consortium would be unconstitutional); People v. Ellis, 57 Ill.2d 127, 311 N.E.2d 98 (1974) (different age for juvenile classification of boys than girls violates the E.R.A.); Page v. Welfare Commissioner, 170 Conn. 258, 365 A.2d 1118, 1124 (1976)(E.R.A. violated when a husband, but not a wife, was allowed deductions for dependent children when calculating [151]*151the amount that must be paid to help support a parent on welfare.); Schilling v. Bedford Cty. Memorial Hosp., 225 Va. 539, 303 S.E.2d 905 (1983) (necessaries doctrine violated E.R.A. because it obligates a husband to pay for his wife’s necessaries, but does not similarly obligate the wife); R.McG. v. J.W., 200 Colo. 345, 615 P.2d 666 (1980) (statute granting a natural mother the right to bring an action for determination of paternity, but not granting the father the same right, violated the Colorado E.R.A.); Com. v. King, 374 Mass. 5, 372 N.E.2d 196 (1977) (punishment of female, but not male, prostitutes violates the E.R.A.).
Although this Court has not had the occasion to address the issue this case presents, our cases since the adoption of the Equal Rights Amendment and the Legislature’s action in enacting the Family Law Article make clear what the proper result should be. As we have seen, this Court has interpreted the Amendment’s “broad, sweeping mandatory language,” see Rand, 280 Md. at 515, 374 A.2d at 904-05, as the expression of Maryland’s commitment to equal rights for men and women and the statement of its intention to alter traditional attitudes with respect to such rights. Id. at 515-16, 374 A.2d at 904-05. See Insurance Com’r of State of Md. v. Equitable Life Assur. Soc. of U.S., 339 Md. 596, 664 A.2d 862 (1995); Tyler v. State, 330 Md. 261, 265-66, 623 A.2d 648, 651 (1993).
At issue in Rand was the validity, in light of the Maryland Equal Rights Amendment, of the common law rule that placed the primary liability for the support of minor children on the father. Holding the rule irreconcilable with the E.R.A., we concluded that the “parental obligation for child support is not primarily an obligation of the father, but is one shared by both parents.” Rand, 280 Md. at 516, 374 A.2d at 905. Another common law rule was at issue in Kline v. Ansell, 287 Md. 585, 593, 414 A.2d 929, 933 (1980), that only men could sue or be sued for criminal conversation. We held that the rule violated the Equal Rights Amendment, explaining that it “provides different benefits for and imposes different burdens upon its citizens based solely upon their sex.” Id. In Condore v. Prince George’s Co., 289 Md. 516, 425 A.2d 1011 (1981), we [152]*152held that the common law doctrine of necessaries, which obligated the husband, but not the wife, to pay for his spouse’s necessaries, violated the Equal Rights Amendment. Noting the Court’s consistent holdings “that a law that imposes different benefits and different burdens upon persons based solely upon their sex violates the Maryland E.R.A.,” this Court, in Turner, 299 Md. at 576, 474 A.2d at 1302, invalidated a criminal statute which prohibited the employment by taverns of so-called female sitters to solicit customers to purchase drinks. We pointed out that, under the statute, a man could be employed as a sitter but a woman could not. Id.
This Court’s custody decision in Elza v. Elza, 300 Md. 51, 475 A.2d 1180 (1984) is also instructive, as is the Legislature’s recodification, as a part of Code Revision, of former Article 72A § 1. The issue in Elza was the validity of the maternal preference presumption and whether the trial court in a child custody proceeding erred in basing its award of custody to the mother solely on it. Stating that the 1974 amendment to Art. 72A, § 1, by providing, clearly and unambiguously, that “neither parent shall be given preference solely because of his or her sex,” expressed the intent of the General Assembly to eradicate sex as a factor in child custody proceedings, this Court abolished the maternal preference doctrine in this State because it permitted custody to be awarded solely on the basis of the mother’s sex.7 See also McAndrew, 39 Md.App. 1, 382 A.2d 1081 (1978), upon which the intermediate court relied and found persuasive.8
[153]*153The Pennsylvania Supreme Court, in Commonwealth ex rel. Spriggs v. Carson, 470 Pa. 290, 368 A.2d 635 (1977), held that the “tender years” doctrine, which is Pennsylvania’s equivalent of Maryland’s maternal preference doctrine, was abolished by that State’s E.R.A. The “tender years” doctrine, in essence, maintains that, in a child custody dispute, where a child is of tender years, the mother is presumed to be the more fit parent. The court in Spriggs struck down that presumption, stating:
“[W]e note that in reaching its conclusion that custody should be awarded to the mother, the majority in the Superior Court relied heavily upon the ‘tender years doctrine’. We ... question the legitimacy of a doctrine that is predicated upon traditional or stereotypic roles of men and women in a marital union. Whether the tender years doctrine is employed to create a presumption which requires the male parent to overcome its effect by presenting compelling contrary evidence of a particular nature, or merely as a makeshift where the scales are relatively balanced, such a view is offensive to the concept of the equality of the sexes which we have embraced as a constitutional principle within this jurisdiction. Courts should be wary of deciding matters as sensitive as questions of custody by the invocation of ‘presumptions’. Instead, we believe that our courts should inquire into the circumstances and relationships of all the parties involved and reach a determination based solely upon the facts of the case then before the Court.”
Id. at 299-300, 368 A.2d at 639-640, citing Commonwealth ex rel. Lucas v. Kreischer, 450 Pa. 352, 299 A.2d 243 (1973); Commonwealth ex rel. Logue v. Logue, 194 Pa.Super. 210, 166 A.2d 60 (1960); Commonwealth ex rel. Parikh v. Parikh, 449 Pa. 105, 296 A.2d 625 (1972); Commonwealth ex rel. Veihdef[154]*154fer v. Veihdeffer, 235 Pa.Super. 447, 344 A.2d 613 (1975); Conway v. Dana, 456 Pa. 536, 318 A.2d 324 (1974).
During the legislative session of 1984, the Legislature recodified Art. 72A § 1 as § 5-203 during the adoption of the Family Law Article.9 See 1984 Laws of Maryland, Chapter 296, p.1925. Rather than recodify the provision without change, the Legislature deleted the phrase, which was found decisive in Elza and McAndrew, “in any custody proceeding, neither parent shall be given preference solely because of his or her sex,” the Revisor’s Note indicating that the phrase was “deleted as unnecessary in light of the Maryland Equal Rights Amendment.” Of course, the Legislature is presumed to be aware of decisions of the Court of Appeals, Romm, v. Flax, 340 Md. 690, 698, 668 A.2d 1, 4 (1995); Harris v. State, 331 Md. 137, 150, 626 A.2d 946, 952 (1993); State v. Bricker, 321 Md. 86, 93, 581 A.2d 9, 12 (1990); Mayor and City Council of Baltimore v. Hackley, 300 Md. 277, 283, 477 A.2d 1174, 1177 (1984), and the Legislature’s inaction or action to effect a statutory change must be considered in that light. Being aware of this Court’s decision in Elza and its Equal Rights Amendment jurisprudence, it is clear that the Legislature not only understands that the amendment prohibits gender preference and disparity based on gender, but also agrees, and intends, that it should.
The respondent argues that even if the trial court should not have used gender in reaching its determination, that court still reached the correct decision when it awarded residential custody to the mother and, therefore, its judgment should be affirmed. She is contending in effect that any error was harmless. We do not agree. Nor will this Court independently review the record and make the best interest determination in the first instance. That matter, being addressed to the discretion of the trial court, ought be resolved by the trial court in the first instance.
[155]*155The trial court erred, as a matter of law, in the instant case; it assumed that the respondent necessarily would be a better custodian solely because she has a female hand, and that a girl child of a certain age has a particular and specific need to be with her same sex parent. In so doing, as in Elza, the trial court applied an invalid legal principle. A review of the record of the hearing reveals, again, much as in the case of Elza, that, but for the trial court’s perception of the need for a female hand for a girl child of Emily’s age, that it believed each parent would be a proper and fit custodian. Indeed, that sex-based reason for the custody award to the respondent was the only reason given for the court’s decision. Therefore, we will remand the case to the circuit court for further proceedings in that court.
The trial court will be required, of course, on remand once again to consider the best interest of the children in deciding their custody and it must fully set forth and explain the reasons for its decision, consistent with this opinion. As in Elza, because additional information will be available and may be presented to the trial court on remand, we express no opinion concerning the ultimate resolution of this custody matter.
JUDGMENT OF THE COURT OF SPECIAL APPEALS VACATED; CASE REMANDED TO THAT COURT WITH INSTRUCTIONS TO REVERSE THE JUDGMENT OF THE CIRCUIT COURT FOR MONTGOMERY COUNTY. COSTS IN THIS COURT AND IN THE COURT OF SPECIAL APPEALS TO BE PAID BY THE RESPONDENT.