The Equal Employment Opportunity Commission appeals a district court decision that the Mississippi State Tax Commission established “physical stamina and the ability to withstand stressful working conditions” as bona fide occupational qualifications under the Age Discrimination in Employment Act,1 justifying the retirement at age 60 of officers charged with enforcing the State’s highway tax laws. Because the Tax Commission did not develop, implement, and enforce minimum health and fitness standards for the retention of officers on the force, the Commission failed to establish physical stamina and the ability to *527manage stress as BFOQs. We therefore reverse the decision of the district court and remand for a determination of the backpay due to officers who were involuntarily retired.
I.
The Mississippi State Tax Commission (MSTC) is responsible for general revenue collection. In 1980, the Mississippi legislature abolished an agency known as the Motor Vehicle Comptroller’s Office and transferred responsibility for the collection of highway taxes to the MSTC. A.C. Lambert, Sr., then chairperson of the MSTC, undertook to overhaul the highway tax collection department because, in his words, “It was determined to be ineffective, no leadership, eaten up to some extent with fraud.”
Assisted by Wood Stringer, a career law enforcement officer, Lambert sought to clarify and to redefine the responsibilities of the highway tax collection department. With the ultimate approval of the state legislature, Lambert and Stringer divided the workforce into three levels of scales-enforcement officers and delineated their duties for enforcing laws pertaining to the registration, licensing, and taxation of commercial trucks using the state highways.2 The officers were authorized to search vehicles for contraband3 and to pursue and arrest truckers who resisted or attempted to avoid the weighing and inspection of their vehicles. To enable the officers to perform these duties, Stringer and Lambert required them to wear uniforms, to drive patrol cars, and to bear weapons.4 Job applicants had to complete Law Enforcement Academy training,5 and all officers had to take semiannual weapons-qualification tests. Finally, Stringer and Lambert recommended and the legislature enacted a mandatory retirement age of 60 for all scales-enforcement officers.6
The EEOC challenged the mandatory retirement age as violative of the Age Discrimination in Employment Act (ADEA).7 After a bench trial, the district court found that scales-enforcement officers face dangers and physical rigors in their work. The court recounted testimony showing that confrontations with truckers may become violent. Chases in pursuit of truckers who attempt to bypass the scales may reach speeds of 80 or 90 m.p.h. Portable scales officers may lift from 40 to 100 pounds of scales out of their vehicles several times a day to weigh trucks at the roadside. Yet “the majority of the officers who testified agreed that most situations were routine and uneventful.”
The court also recounted the testimony of Dr. Charles Marx who succeeded Lambert as chairperson of the MSTC in 1985. Dr. Marx testified that the law enforcement division had made significant progress since the days when it was part of the Motor Vehicle Comptroller’s Office, but that much still needed to be done. He expressed particular concern about the qualifications of officers who had been employed by the old agency and remained on the force. Marx, said that many of them could not meet the physical standards required of newly hired officers at the Law Enforcement Training Academy, although he admitted on cross-examination that, even after the demise of the Motor Vehicle Comptroller's Office, the MSTC had hired officers who failed physical training at the Academy. He dismissed the possibility of firing officers on the ground that they fell short of the Academy’s physical standards because the termination procedures promulgated by the State Personnel Board were *528too lengthy and costly to be feasible for a struggling new agency division.
Finally, the district court reviewed the expert testimony. Experts called by the MSTC testified that persons decline in physical and aerobic capacity as they get older and that medical testing cannot reliably reveal all kinds of heart disease. The MSTC also offered a study by the industrial psychology firm of Morris & McDaniel concluding that the scales-enforcement officer’s job is a law enforcement position involving occasional confrontations with life-threatening situations. Dr. Morris testified that no occupational test can accurately measure reactions to life-threatening situations. The EEOC’s experts testified, on the contrary, that aging is an individual process and that a uniform mandatory retirement age at 60 fails to take account of personal fitness. They maintained that fitness and reaction-time testing were reliable indicators of ability to perform most of the tasks in question.
The district court correctly stated the test for determining whether an employer, including a state agency,8 has established a BFOQ: Under Western Air Lines v. Criswell 9 and Usery v. Tamiami Trail Tours,10 employers asserting a BFOQ defense must prove (1) that particular job qualifications are reasonably necessary to the essence of the business and (2) that age is a necessary proxy for these qualifications either because all or substantially all older people cannot perform the job or because individual testing for the qualifications would be highly impractical. Showing appropriate deference to the MSTC’s determination,11 the court identified the essence of the business of scales-enforcement officers as “the enforcement of the laws of the State” and found that the tasks critical to this mission included pursuit driving, dealing with hostile and aggressive individuals, sometimes restraining truckers by use of force, and observing trucks for violations. Relying on the expert testimony offered by the MSTC, the district court concluded, “physical stamina and the ability to withstand stressful working conditions are essential to the safe and efficient execution of the duties of a Scales Enforcement Officer.” The court found further that most people over 60 lacked these qualifications or could not be tested for them on an individual basis. The court held therefore that the MSTC had established a BFOQ.
In reaching this decision, the district court rejected the EEOC’s argument that an employer could not prove a BFOQ without first establishing minimum health and fitness standards and somehow monitoring employees for compliance with these standards. Relying on two cases decided in the Eighth and First Circuits, the district court held, as a matter of law, that the “ ‘failure ... to monitor physical standards ... is not necessarily inconsistent with ... recognizing that certain levels of strength, aerobic capacity, coronary fitness, etc., are necessary for effective police work.’ ”12 Having concluded that the implementation and enforcement of minimum health and fitness standards was unnecessary to establishing a BFOQ, the district court made no explicit finding of fact concerning whether or not the MSTC maintained such standards.
II.
The federal circuits are split on the question whether an employer must implement and enforce minimum standards of “physical stamina” and “the ability to withstand stressful working conditions” in order to *529prove such qualifications reasonably necessary to the essence of the business and to defend age discrimination on this basis. The First and Eighth Circuits hold that testing and monitoring employees for compliance with minimum standards is unnecessary so long as the employer provides “objective evidence on whether the older employees can perform their duties.”13 Those courts accept as adequate evidence, similar to that adduced in this case, showing that the job involves law enforcement activities requiring physical rigor and fitness for safe performance. The Third Circuit, on the contrary, interprets a BFOQ defense based on health and fitness to require a showing that the employer maintains minimum standards throughout the workforce:
While the ADEA does not require perfect monitoring and maintenance of a particular qualification at all age levels, it does bar selective enforcement of health and fitness requirements.... Until minimum standards are developed, implemented and enforced, the PSP [Pennsylvania State Police] cannot justify its mandatory retirement law by relying on good health and physical conditioning as BFOQs reasonably necessary to PSP business.14
Our decision in EEOC v. Mississippi,15 issued after the district court’s decision in this case, borrows from the Third Circuit’s analysis. In that case, conservation officers in the Department of Wildlife Conservation challenged the State’s policy of retiring them at age 60.16 State law required these officers to attend the Law Enforcement Academy and charged them with enforcement of the fish and game laws as well as the laws proscribing cattle theft.17 Moreover, the State argued to this court that conservation officers faced life-threatening situations in the pursuit and arrest of armed, illegal night-hunters. Although the evidence concerning the conditions of employment and necessary qualifications of conservation officers was markedly similar., to the evidence regarding scales-enforcement officers, the district court in the earlier case held that the State had failed to establish a BFOQ. The court found that the qualifications asserted — “including vigor, strength, quickness, and other imprecise qualities generally thought of as youthful attributes” — were too vague to support a finding of reasonably necessary job qualifications under the first prong of the BFOQ test18 and that, in any case, the State enforced no such qualifications in that it performed “[n]o medical monitoring of any sort” and indeed retained many younger officers with serious health or fitness problems.19
We affirmed the district court's decision. Although we recognized that “[e]mployers are entitled to articulate the qualifications they consider essential to their businesses and to exercise substantial discretion in judging the reasonableness of safety-related job qualifications,”20 we held that the ADEA circumscribed their discretion in an important respect:
It is the finding of minimum standards that are “developed, implemented and enforced” that provides the threshold limiting an employer’s discretion in establishing a BFOQ defense. Not only would a finding of minimum standards limit an employer’s discretion, but also it would satisfy the Supreme Court’s concern to decrease stereotypes unsupported by objective fact and would ensure both that a *530good faith decision on required qualifications was made by a competent authority and that the use of age as a proxy was proper.21
The enforcement of minimum standards would “decrease stereotypes” by subjecting all employees to the same job requirements rather than disqualifying older people for presumed lack of “physical stamina” and “the ability to withstand stressful working conditions” without ever determining whether younger employees have such qualifications and in what measure. In the absence of minimum standards, “there is no essential qualification that age can stand as a proxy for.”22
To hold that an employer must develop, implement, and enforce minimum standards in order to establish good health and fitness as BFOQs does not, as the Eighth Circuit has put it, “ignore ... the testimony of the ... expert witnesses as to the inadequacy of physical examinations and testing as methods of distinguishing between qualified and unqualified individuals over the age of sixty.”23 We do not impose on the MSTC or any other employer the burden of developing tests that perfectly distinguish the fit from the unfit or the healthy from the unhealthy. Contrary to what our colleague Judge Jones suggests in her concurrence, we also do not require law enforcement agencies to adopt minimum standards foreign or peripheral to their missions. Neither the Age Discrimination Act nor this court mandates that employers adopt any standards, minimum or otherwise, unless the employers seek to justify an early retirement program on the basis of health and fitness qualifications. It is the MSTC itself that argues that “physical stamina and the ability to withstand stressful working conditions” are reasonably necessary to the central tasks of scales enforcement officers.
We simply hold that in the absence of any minimum standards or any attempt to monitor employees’ health and fitness, an employer fails to lay a factual foundation upon which a court may rest a finding that specified degrees of physical stamina or the ability to manage stress are reasonably necessary to the essence of the business. An employer may not rely on health and fitness qualifications to retire older officers if it does not seek to maintain minimum levels of these qualifications among younger ones. Thus, the district court erred in finding that the MSTC had established reasonably necessary job qualifications without first determining whether the MSTC had set minimum standards.
The MSTC argues that this court’s decision in EEOC v. University of Texas Health Science Center 24 demonstrates that we do not require a “particularized, factual showing”25 of specific health and fitness qualifications in cases involving law enforcement officers. In Health Science Center, we approved a maximum hiring age of 45 for campus police in the University of Texas system, affirming the district court’s finding that “older individuals lack the acute physical and mental agility and stamina required to serve effectively as rookie campus officers.” 26 The panel did not specify what levels of physical and mental agility and stamina were required for completing the required law enforcement training course but noted that the course was rigorous and dangerous for trainees over 45.27 It is of course possible, nonetheless, that minimum standards were in place.
Health Science Center was decided before the Supreme Court made clear in Cris-well that an employer must show that “a job qualification has been carefully formulated to respond to documented concerns *531for public safety.”28 The Supreme Court emphasized that the ADEA is based on empirical fact: “[T]he process of psychological and physiological degeneration caused by aging varies with each individual.” 29 The panel in Health Science Center accepted as not clearly erroneous a finding that “acute physical and mental agility and stamina” were reasonably necessary to the business of campus police, although these qualifications might be too vague to stand under Criswell or EEOC v. Mississippi. The Health Science court, however, rested its affirmance on an independent finding by the district court that, on college campuses, “younger officers are needed to understand and relate to potential offenders and to prevent minor occurrences from erupting into major ones.”30 This court found the ability to relate to young people “in no way tangential to [the officers’] ... primary task of insuring the safety and protection of the campus community.” 31 No job qualification involving the ability to relate to the young arose in Criswell, in the Mississippi conservation officers’ case, or in this case. Thus Health Science Center rests at least in part on a BFOQ entirely distinct from that at issue in the later cases involving law enforcement or public safety.
III.
Our holding that an employer must develop, implement, and enforce minimum standards in order to rely on health and fitness as BFOQs does not dispose of this case. We have yet to determine whether the MSTC established and maintained such standards, and we must do so without a preliminary finding by the district court to guide us. Because the EEOC tried the case on the theory that the law required a showing of minimum standards, however, the record is exhaustive and a remand is unnecessary on this point.
The MSTC asserts that it maintains minimum standards of health and fitness among scales-enforcement officers. It points to sections of the Mississippi Code in which the legislature announces its intent “to provide for the coordination of training programs for law enforcement officers and to set standards therefor” 32 or authorizes the State Board on Law Enforcement Training to “fix other qualifications for the employment of law enforcement officers, including ... physical and mental standards.” 33 These statutes express a legislative endorsement of the development of minimum standards without actually formulating any. Acting under the authority of these sections, the Board on Law Enforcement Training issued a directive that applicants for law enforcement jobs must present “[p]roof of a recent physical examination by a licensed medical doctor reflecting mental and physical well being.”34 Similarly, the MSTC included in its description of the scales officer’s job the caveat that applicants “must be found, after examination by a licensed physician or surgeon, to be free from any physical, emotional, or mental conditions which might adversely affect exercising the powers or duties of an enforcement officer.”35 Such pronouncements are too general and vague to constitute minimum standards under the ADEA.36
The MSTC relies also on the qualifications for entrance into the Law Enforce? ment Academy, which all newly hired scales-enforcement officers now attend. An applicant to the Academy must produce from his own physician a report on his health and physical condition, including information on his weight, height, hearing, sight, as well as EKG results and a blood *532pressure reading.37 The standard form notifies the physician of 38 activities that will be expected of officers, including driving emergency vehicles, lifting and carrying up to 70 pounds, climbing ladders, and subduing prisoners.38 The form also specifies that officers may work under conditions involving long hours, exposure to extreme temperatures, and working remote from emergency medical assistance.39 Finally, the form instructs the doctor:
Law enforcement officers are required to participate in vigorous self-defense and firearms training and daily physical exercises during Basic Training. This includes daily calisthenics and running a self-paced minimum Vh miles before completion of the training course. Any physical conditions which might prevent an officer from engaging in such physical activity should be carefully evaluated. Any physical condition which might jeopardize an officer’s safety during training should disqualify that officer from training until the condition can be corrected.40
The physician must certify that the patient is physically able to perform the duties of an officer and to participate in basic training. Once at the Academy, trainees must complete 22 hours of “physical fitness and conditioning,” 30 hours of “unarmed defense and arrest techniques,” and 16 hours of “driver training” during the eight-week course.41
We note initially that the qualifications for entrance into the Academy and for completion of the course are identical for scales-enforcement officers and conservation officers, and that in the conservation officers’ case we affirmed the district court’s finding that these do not constitute minimum standards.42 This precedent is not dispositive, however, because the district court’s finding in the earlier case was protected by the clearly erroneous rule43 whereas in this case we proceed without a finding on minimum standards. Nevertheless, the factors militating against a finding of minimum standards in the earlier case44 are also at work here.
Although the physician’s certification form sets forth reasonably specific and detailed qualifications, the MSTC’s and the Academy’s practices belie any commitment to maintain or enforce these qualifications. The Academy has accepted and graduated officers, subsequently hired by the MSTC, whose physicians neglected to include EKG results on the form45 or noted under “abnormalities” that the patients were obese46 or suffered from hypertension or high blood pressure.47 The Academy has graduated and the MSTC has hired officers who failed the physical fitness and conditioning course48 or the driving course.49 Moreover, Dr. Marx, chairperson of the MSTC, testified that the Commission does not require the Academy to forward the officers’ medical certificates to the Commission. As a result, the MSTC operates without any specific information about the officers’ medical conditions or histories.
More important than any of these factors, however, is that the MSTC conducts no fitness or health programs or tests after hiring an officer to determine whether he remains competent to serve. When an officer is on sick leave for more than three days, he must submit a doctor’s note stating that he was ill, but the note need not state that he is fit to return to work. To hire officers who are both obese and have high blood pressure and to require no regular physical examinations or *533fitness training betrays a serious lack of concern for their cardiovascular health. However stringent the qualifications for admission into the Academy — and we have indicated that the actual adherence to these qualifications was less than strict — the MSTC would be hard pressed, to justify a mandatory retirement age without showing that it continues, somehow, to monitor the health and fitness of its employees. An arduous training program for rookies may be relevant to defending a maximum hiring age such as that at issue in Health Science Center,50 but evidence of the continuing (or deteriorating) health and fitness of the workforce is far more probative in a case involving a mandatory retirement age.
The MSTC advances two reasons for its failure to monitor health and fitness. It refers this court to Miss.Code Ann. § 45-6-11 which provides in relevant part:
Law enforcement officers already serving under permanent appointment on July 1, 1981, shall not be required to meet any requirement of subsections (2) and (3) of this section [regarding minimum “physical and mental standards”] as a condition of continued employment; nor shall failure of any such law enforcement officer to fulfill such requirements make that person ineligible for any promotional examination for which that person is otherwise eligible.
This “grandfather clause” may explain why the Commission does not require its more senior employees to meet minimum health and fitness standards, but the clause does not explain why the MSTC fails to subject any of its incumbent officers to minimum standards, whether or not they were hired before July 1, 1981. The MSTC next argues that it cannot monitor health and fitness because the officers are geographically dispersed throughout the State and gathering them together at a central location for testing would be impractical. We do not suggest, however, that monitoring must take place at a central location. The Academy now requires medical certificates, containing much crucial information (if properly filled out), from each applicant’s own physician. We do not see why a similar requirement of regular medical certifications after hiring would demand inconvenient or expensive travel. Moreover, the Commission already groups its officers together at five locations throughout the state for weapons-qualification tests every six months. If a gathering is necessary, it is difficult to imagine why these occasions do not provide an opportunity.
A review of the evidence thus leaves us with the firm conviction that the MSTC has not developed, implemented, and enforced minimum standards that might justify a finding that health and fitness qualifications are reasonably necessary to the essence of the Commission’s business. Because the Commission has not met its burden under the first prong of the Tamia-mi/Criswell test, and therefore cannot establish a BFOQ, we express no opinion concerning the second prong of the test.51
The judgment of the district court is REVERSED, and the case is REMANDED for a determination of the amount of back-pay due to officers retired involuntarily.
. 29 U.S.C. § 623(f) (1982).
. Miss.Code Ann. § 27-5-71 (1972), § 27-5-75 (Supp.1987).
. Miss.Code Ann. § 63-5-49 (Supp.1987).
. Miss.Code Ann. § 27-5-75 (Supp.1987).
. See generally Miss.Code Ann. §§ 45-6-1, 45-6-11 (1972).
.Miss.Code Ann. § 27-5-75 (Supp.1987) provides in relevant part: "From and after July 1, 1985, all inspection station employees and all field inspectors who attain the age of sixty-two (62) years on or before June 30, 1986, and those who attain the age of sixty (60) years thereafter shall be retired forthwith."
.29 U.S.C. § 623(a) (1982).
. 29 U.S.C. § 630(b) (1982); EEOC v. Wyoming, 460 U.S. 226, 103 S.Ct. 1054, 75 L.Ed.2d 18 (1983).
. 472 U.S. 400, 105 S.Ct. 2743, 2751-52, 86 L.Ed.2d 321 (1985).
. 531 F.2d 224, 235-36 (5th Cir.1976).
. EEOC v. Mississippi, 837 F.2d 1398, 1400-01 (5th Cir.1988).
. EEOC v. Mississippi State Tax Comm'n, No. J83-0717(W) (S.D.Miss. July 10, 1987) (quoting EEOC v. City of East Providence, 798 F.2d 524, 529 n. 4 (1st Cir.1986)). See also EEOC v. Missouri State Highway Patrol, 748 F.2d 447, 454 (8th Cir.1984), cert. denied, 474 U.S. 828, 106 S.Ct. 88, 88 L.Ed.2d 72 (1985).
. Missouri State Highway Patrol, 748 F.2d at 454; City of East Providence, 798 F.2d at 529.
. EEOC v. Pennsylvania, 829 F.2d 392, 395 (3d Cir.1987), cert. denied, — U.S.-, 108 S.Ct. 1109, 99 L.Ed.2d 271 (1988). See also Heiar v. Crawford County, 746 F.2d 1190, 1198-99 (7th Cir.1984), cert. denied, 472 U.S. 1027, 105 S.Ct. 3500, 87 L.Ed.2d 631 (1985); EEOC v. New Jersey, 631 F.Supp. 1506 (D.N.J.1986), aff'd, 815 F.2d 694 (3d Cir.1987).
. 837 F.2d 1398.
. Miss.Code Ann. § 49-1-15 (Supp.1987).
. Miss.Code Ann. §§ 49-1-13, 49-1-15 (Supp. 1987).
. EEOC v. Mississippi, 654 F.Supp. 1168, 1180 (S.D.Miss.1987), aff'd, 837 F.2d 1398 (5th Cir. 1988).
. Id. at 1181-82.
. EEOC v. Mississippi, 837 F.2d at 1400.
. Id at 1401.
. Id at 1402 (emphasis in original).
. Missouri State Highway Patrol, 748 F.2d at 454.
. 710 F.2d 1091 (5th Cir.1983).
. Johnson v. Mayor and City Council of Baltimore, 472 U.S. 353, 105 S.Ct. 2717, 2722, 86 L.Ed.2d 286 (1985).
. 710 F.2d at 1094.
. Id at 1095.
. Criswell, 472 U.S. at 419, 105 S.Ct. at 2754. See also id. at 414 n. 19, 105 S.Ct. at 2751 n. 19.
. Id. at 409, 105 S.Ct. at 2749.
. 710 F.2d at 1095.
. Id. at 1096.
. Miss. Code Ann. § 45-6-1 (1972).
. Miss. Code Ann. § 45-6-11 (1972).
. Defense Exhibit 9(A).
. Defense Exhibits 7(A)-(D).
. See Criswell, 472 U.S. at 414, 105 S.Ct. at 2751 n. 19; EEOC v. Mississippi, 654 F.Supp. at 1180, aff'd, 837 F.2d 1398.
. Defense Exhibit 8.
. Id
. Id
. Id.
. Defense Exhibit 6.
. EEOC v. Mississippi, 837 F.2d at 1402.
. Fed.R.Civ.P. 52(a).
. See EEOC v. Mississippi, 654 F.Supp. 1168.
. Plaintiffs’ Exhibits 90-B and D.
. Plaintiffs’ Exhibits 91-A, B, D, E, and F.
. Plaintiffs’ Exhibits 91-E, 90 A-C, I.
. Plaintiffs' Exhibits 93-J and K, 1-1.
. Plaintiffs’ Exhibits 93-E, 1-1.
. 710 F.2d 1091.
. See EEOC v. Mississippi, 837 F.2d at 1402.