Anthony Lombardi, appellant, was employed as a firefighter and paramedic by Montgomery County Department of Fire *699 and Rescue Services, appellee. In 1988, he was diagnosed with hypertension. Roughly three and one-half years later, in late 1991, an examining physician concluded that appellant’s condition stemmed from his employment. He thereafter filed a claim seeking compensation under the Maryland Workers’ Compensation Act (the Act). See Maryland Code (1991 Repl.Vol., 1995 Supp.), §§ 9-101 to 9-1201 of the Labor and Employment Article (LE). In an Order dated April 18, 1994, the Workers’ Compensation Commission (the Commission) disallowed his claim, finding that it was barred by the applicable two-year statute of limitations in respect to the filing of claims with the Commission and that appellant had not sustained an occupational disease arising out of and in the course of his employment within the meaning of the Act. On appeal to the Circuit Court for Montgomeiy County, faced with cross-motions for summary judgment, the court granted summary judgment in favor of appellee. In this appeal from that judgment, appellant presents three questions, which we rephrase as follows:
1. Did the circuit court err when it ruled that the statute of limitations began to run when the claimant knew or should have known that his occupational disease was caused by his employment?
2. Did the circuit court err in granting summary judgment because the question of when appellant knew or should have known that his illness was caused by his employment was a question of material fact still in dispute?
3. Did the circuit court err in concluding that the statute of limitations began to run in 1988 because appellant was not actually incapacitated or disabled at that time?
Because we hold that the circuit court erred in respect to appellant’s first two questions, we shall reverse the grant of summary judgment in favor of appellee and remand this case to the circuit court.
Statement of the Facts
Appellant was employed as a firefighter and paramedic by appellee for thirteen years. As a result of an unrelated back *700 injury, he retired from service in April of 1988 on a disability pension. Upon his retirement, appellant was given an exit physical examination, during which no finding of an elevated or heightened blood pressure was made.
Later that same year, appellant was first diagnosed with hypertension in the course of a routine visit to his family physician. According to appellant, it was not until 1991, following a discussion with his attorney, that he realized that there could be a connection between his hypertension and his former occupation. This belief was substantiated when a Dr. Richard Schwartz thereafter reached the opinion that appellant’s hypertension did, in fact, result from his work as a firefighter.
Appellant filed a claim with the Commission on September 7, 1991, more than three years after the initial diagnosis, but at approximately the same time as the rendering of Dr. Schwartz’s opinion, stating that he had become disabled due to hypertension, an occupational disease, as a result of his employment as a firefighter. 1 At the subsequent hearing, held on March 21, 1994, appellant testified that it was in 1991, well after he had retired from appellee’s employ, that he first realized that his hypertension was related to his former employment. By Order dated April 18, 1994, the Commission disallowed appellant’s claim upon finding (1) that it was barred by the two-year statute of limitations for occupational diseases and (2) that appellant had not sustained an occupational disease arising out of and in the course of his employment within the meaning of the Act. From this determination, appellant filed a Petition for Judicial Review in the Circuit Court for Montgomery County.
*701 Before the circuit court, appellant filed a Motion for Partial Summary Judgment, in which he sought a determination that his claim was not barred by the statute of limitations. Appellee, in response, filed a memorandum in opposition thereto and a Cross-Motion for Summary Judgment. A hearing was held on the cross motions, during which the court remarked on the similarity between this case and a case previously heard by the court. 2 The court, consistent with its ruling in that prior case, held that the statute of limitations began to run when appellant had either knowledge or reason to believe that his hypertension was job-related. The court then found that the limitations period began to run when appellant was first diagnosed with hypertension, and, because he had not filed his claim within two years from that time, his claim was barred. See LE § 9-711(a). Summary judgment was, accordingly, entered by the circuit court in favor of appellee. Because of the nature of its ruling, the trial court did not address the second prong of the Commission’s findings.
The Knowledge Requirement of LE § 9-711(a)(2)
Appellant avers that the circuit court erred when it ruled that the two-year statute of limitations began to run when he was first diagnosed with hypertension—i.e., when he should have known that his hypertension was causally related to his former employment as a firefighter. Instead, appellant insists, the statute of limitations began to run when he first had *702 actual knowledge that his disability was linked to his occupation.
Section 9-711(a) of the Act, the limitations section at issue, in relevant part, reads:
(a) Filing claim:—If a covered employee suffers a dis- • ablement or death as a result of an occupational disease, the covered employee ... shall file a claim with the Commission within 2 years ... after the date:
(1) of disablement or death; or
(2) when the covered employee ... first had actual knowledge that the disablement was caused by the employment. [Emphasis added.]
In undertaking an analysis of this section, we must first set forth the principles that guide our interpretation of a statute. Our end, in this respect, is to determine the intent of the Legislature when it adopted the section now in dispute.
State v. Kennedy,
*703
However, “the plain meaning rule of construction is not absolute; rather, the statute must be construed reasonably with reference to the purpose, aim, or policy of the enacting body.”
Tracey v. Tracey,
Furthermore, in workers’ compensation cases, “[a]ny uncertainty in the law should be resolved in favor of the claimant.”
Victor v. Proctor & Gamble Mfg. Co.,
Although we perceive the language of LE § 9-711(a)(2) to be clear and unambiguous on its face, a review of prior codifications of this section will be instructive, because “[generally, a substantive amendment to an existing statute indicates an intent to change the meaning of that statute.” In re
Criminal Investigation No. 1-162,
Starting in 1947, Article 101, § 26 3 of the Maryland Code read, in pertinent part:
*704 If no claim for disability or death from an occupational disease be filed with the State Industrial Accident Commission [4] within one 0) year from the date of disablement or death, as the case may be, the right to compensation for such disease shall be forever barred[.] [1939 Acts, ch. 645, § 1.]
The Court of Appeals addressed this statutory language in
Consolidation Coal Co. v. Porter,
that the words of the statute now in question mean ... that limitations as to notice to the employer, and as to the time of filing of the claim, Article 101, Section 26, supra, started to run in this occupational disease case from the time the employee or some one in his behalf knew or had reason to believe that he was suffering from an occupational disease *705 and that there was a causal connection between his disability and occupation....
Id.
at 506,
In
Mutual Chem. Co. of Am. v. Pinckney,
In 1967, Article 101, § 26 was amended. For the first time, the Legislature included an explicit knowledge requirement in that portion of the section here at issue. In relevant part, it read:
If no claim for disability or death from an occupational disease be filed with the Workmen’s Compensation Commission within two (2) years from the date of disablement or the date when the claimant first has actual knowledge such disablement was caused by his employment, or death, as the case may be, the right to compensation for such disease *706 shall be forever barred[.] [1967 Acts, ch. 153, § 1.] [Emphasis added.]
Although not included in the passage quoted, the amendment did not place into separate sections the limitations periods for filing a claim -with the employer and for filing a claim with the Commission.
This Court was called upon to decipher the implications of this change in the statutory language in
Burdock v. Kaiser Aluminum & Chem. Corp.,
The version of § 26 which is to be applied in the instant case, however, is different from the 1947 text. The claim under the provisions of the section here applicable, had to be filed “within 2 years from the date of disablement or the date when the claimant first had actual knowledge that his disablement was caused by his employment.... ” The stat *707 utory requirement of “actual knowledge” by the claimant negates the Porter holding that if someone on his behalf had knowledge, the limitations period would start to run.
Id.
at 643,
Turning back—or rather forward—to LE § 9-711(a), it is largely in sync with the 1967 text quoted above.
7
It acts as a bar to a claim if a covered employee does not file his or her claim with the Commission within two years after the date “when the covered employee ... first had actual knowledge that the disablement was caused by the employment.” LE § 9-711(a)(2). Additionally, the statutorily prescribed periods for filing a claim with an employer and for filing a claim with the Commission, which were previously in one section, are now codified in separate sections.
See
1991 Acts, ch. 8, § 2. Section 9-705(a) of the Act provides that written notice of a disability, as a result of an occupational disease, “shall be given to the employer by the covered employee ... within 1 year after the covered employee
knows or has reason to believe
that the covered employee has the occupational disease.” (Emphasis added.) The emphasized language encom
*708
passes a constructive knowledge requirement. In this respect, LE § 9-705 reflects the Court of Appeals’s interpretation in
Porter, supra,
We are still left with the question of what constitutes “actual knowledge.” The Act does not define the term, and, being clear and unambiguous, we are inclined to accord those words their common and ordinary meaning. In addition, we note that, in a legal context, use of the word “actual” means,
inter alia:
“Something real, in opposition to constructive or speculative____ It is used as a legal term in contradistinction to [the terms] virtual or constructive....”
Black’s Law Dictionary 34
(6th ed. 1990). Thus, by phrasing the standard as one requiring actual knowledge, the Legislature explicitly departed from the past standard. The circuit court, in applying a constructive—knows or should have known—standard, applied a legal criterion in respect to the filing of claims with the Commission that has not been the law of this State since 1967. Thus, the trial court erred. In so noting, we resolve this question in favor of the claimant.
Victor, supra,
The Grant of Summary Judgment
Maryland Rule 2-501(a) provides, “Any party may file at any time a motion for summary judgment on all or part of an action on the ground that there is no genuine dispute as to any material fact and that the party is entitled to judgment as a matter of law.” “The purpose of the summaiy judgment procedure is to decide whether there is an issue of fact sufficiently material to be tried, not to try the case or to resolve factual disputes.”
Hartford Ins. Co. v. Manor Inn of Bethesda, Inc.,
‘When the moving party has provided the court with sufficient grounds for summary judgment, the opposing party must demonstrate that there is a genuine dispute of material fact by presenting facts that would be admissible in evidence.”
Gross v. Sussex, Inc.,
In the case sub judice, appellant claims that the circuit court erred in granting summary judgment in favor of appellee because the question of whether appellant had actual knowledge is a material fact still in dispute. For our purposes, summary judgment in favor of appellee would only have been appropriate if we were to conclude that no reasonable fact finder could have failed to find that appellant had actual knowledge—as that term is used in LE § 9-711—that his hypertension was causally related to his former occupation at the time it was first diagnosed in 1988, According to appellant’s testimony before the Commission, he did not suspect or believe that he was suffering from a compensable occupational disease until 1991. Drawing all inferences in his favor, we hold that reasonable minds could have differed as to when appellant had the requisite knowledge. Disposing of the issue *711 by way of summary judgment was, therefore, completely inappropriate, and the trial court erred in ruling that, as a matter of law, appellant’s claim was barred by the statute of limitations. We explain further.
Generally, the question of when a cause of action accrues is one that is properly decided by the court.
Poffenberger v. Risser,
In
Poffenberger,
Poffenberger acquired a parcel of land that was subject to a number of restrictions that were recorded on the plat. Following the purchase, he contracted with a builder for the construction of a home. The building was completed in 1972, and the family moved in. Four years later, it was discovered that the house violated the setback requirements. The homeowner, thereafter, brought a negligence and breach of contract action against the builder. Finding that the suit was barred by the applicable three-year statute of limitations, the circuit court entered summary judgment in favor of the builder.
In
O’Hara,
[T]he factual nuances of the case, susceptible to varying interpretations to which that standard must be applied, are questions for a jury, subject to instructions of the court as to what in law is sufficient to constitute a bar or to take the case out of the statute.
O’Hara,
Hence, our determination of the propriety of a grant of summary judgment on limitations grounds is the same as our review of such a grant based on any other ground—that is, when there is a material fact still in dispute on the issue of when the statute of limitations begins to run, the grant of *713 summary judgment is not proper. Before the circuit court, attached to appellant’s Motion for Partial Summary Judgment, were four exhibits. Chief among them is appellant’s sworn testimony before the Commission, in which he stated that he did not know that his hypertension related to his former employment until he was so informed by Dr. Schwartz. Corroborating this is the report from Dr. Schwartz, dated November 27, 1991. In opposition to appellant’s Partial Motion for Summary Judgment, appellee even argued: “In any event, discovery in this case is ongoing and undoubtedly will disclose additional evidence which further demonstrates that a material dispute exists as to when [appellant] knew of the alleged casual relationship between his hypertension and his former employment as a paramedic.” As appellee appears to have conceded below, the question of when appellant had the requisite knowledge that his hypertension stemmed from his work as a firefighter is a material fact over which reasonable minds could differ. The resolution of this question, therefore, was not proper on motion for summary judgment.
Given our resolution of appellant’s first two questions, we decline to address his third question.
JUDGMENT VACATED; CASE REMANDED FOR FURTHER PROCEEDINGS CONSISTENT WITH THIS OPINION; COSTS TO BE PAID BY APPELLEE.
Notes
. Within the Act, LE § 9-503(a) serves to create a rebuttable presumption that a paid firefighter who has been diagnosed with hypertension is presumed to have a compensable occupational disease that was suffered in the line of duty.
See generally Board of County Comm’rs v. Colgan,
. The circuit court was referring to
Frank v. Montgomery County,
Civil No. 116937 (1994), a factually similar case, in which the circuit court granted summary judgment in favor of the County roughly one month prior to its hearing on the instant matter. That order was subsequently appealed to this Court. A prior panel filed an unreported opinion,
Frank v. Montgomery County,
. Article 101 of the Maryland Code, Workmen's Compensation, was repealed by 1991 Md.Laws, Chap. 8, § 1, effective October 1, 1991. It *704 was, thereafter, codified, in large part, without substantive change, as title 9 of the Labor & Employment Article.
4. As recounted by the Court of Appeals in
Holman v. Kelly Catering,
. Until 1983, workers’ compensation claims for occupational diseases were referred to a Medical Board for determination of controverted medical questions, including the nature and date of disablement.
. Burdock had been previously hospitalized for the same condition in 1964. A workmen's compensation claim had at that time been filed on his behalf with his employer’s workmen’s compensation insurance carrier.
. Article 101, § 26 was again amended by 1973 Acts, ch. 671, § 1. No substantive changes relevant to the case sub judice were made at that time.
. The issues presented on this appeal are limited to whether appellant filed a timely claim with the Commission. We, therefore, decline to address the conflicts, if any, between the actual knowledge requirement for filing of claims with the Commission, LE § 9-711 (a), and the constructive knowledge requirement for filing of claims with an employer, LE § 9-705(a). Our review of the transcript of the Commis *709 sion’s hearing failed to disclose an instance where appellee raised such an objection below nor has it been raised before the trial court or before this Court and, thereby, appellee waived any issue in this regard.
