Peterson, Justice.
This appeal in a personal injury case arising from an automobile accident is before this Court on certified questions from the United States Court of Appeals for the Eleventh Circuit. At issue is the proper interpretation of OCGA § 9-11-67.1, which governs the formation of settlement agreements pursuant to a pre-suit “offer to settle a tort claim for personal injury, bodily injury, or death arising from the use of a motor vehicle and prepared by or with the assistance of an attorney on behalf of a claimant or claimants” (a “Pre-Suit Offer”). OCGA § 9-11-67.1(a). We conclude that OCGA § 9-11-67.1 does not prohibit a claimant from conditioning acceptance of a Pre-Suit Offer upon the performance of some act, including a timely payment. We leave it to the Eleventh Circuit to apply this principle to the facts of this case.
1. Factual and, procedural background
The relevant facts are largely undisputed. On March 20, 2014, Thomas Dempsey was driving his car in Georgia when he collided with a pickup truck operated by Boris Woodard in which Woodard’s adult daughter, Anna Woodard, was a passenger. Both Woodards were injured, and Anna died of her injuries. Dempsey’s vehicle was insured under a personal automobile liability policy issued by Grange Mutual Casualty Company (“Grange”) with liability limits of $50,000 per person, $100,000 per accident. Grange assigned claims representative Heather Conn to handle Boris Woodard’s personal injury claim, as well as Boris and Susan Woodard’s wrongful death claim for Anna. The Woodards selected T. Shane Peagler of the Law Offices of Michael Lawson Neff, PC., to represent them in the matter.
On June 19, 2014, Peagler sent Conn a letter making a settlement offer, under the heading, “Offer to Settle Tort Claims Made Pursuant to OCGA § 9-11-67.1 and OCGA § 51-12-14.” In his letter, Peagler said that the Woodards offered a limited release of their claims against the Dempseys and Grange in exchange for the $ 100,000 policy limit. The letter contained a list of demands under the boldface heading, “Note: The following items must be noted and fully and strictly complied with in order to accept this offer[.]” Among those demands were the following:
• “Pursuant to O.C.G.A. § 9-11-67.1, you have 30 days from your receipt of this offer to accept it.”
• “Your acceptance of this offer must be in writing to me at the above address shown in my letterhead. If we do not actually [849]*849receive a timely acceptance, this offer will be deemed rejected, and we will file a lawsuit against your insureds to recover the total amount of losses caused by your insureds, instead of the limited amount afforded by your coverage and other coverage that may be available.”
• The Dempseys and a Grange officer were required to provide affidavits swearing that the insurance coverage from Grange was the only coverage available and that no excess or umbrella policies were available. “All three affidavits must be received in my office within ten (10) days after your written acceptance of this offer to settle. Timely compliance with this paragraph is an essential element of acceptance.”
• “Ifpayment is not tendered in cash pursuant to OCGA § 9-11-67.1 (f)(1), payment in the amount of $50,000 must be made payable to ‘Boris and Susan Woodard and Michael L. Neff, their attorney for the wrongful death of their daughter, Anna Woodard,’ within ten (10) days after your written acceptance of this offer to settle. Timely payment is an essential element of acceptance.”
• “Ifpayment is not tendered in cash pursuant to OCGA § 9-11-67.1 (f)(1), payment in the amount of $50,000 must be made payable to ‘Boris Woodard and Michael L. Neff, his attorney’ within ten (10) days after your written acceptance of this offer to settle. Timely payment is an essential element of acceptance.”
Peagler agreed that Grange had until July 23, 2014, to accept the offer. In a letter dated July 22, 2014, Conn told Peagler, “We accept your demand as outlined in your correspondence of June 23, 2014.” The letter stated that the requested affidavits and checks would follow under separate cover within ten days. Conn e-mailed Peagler the affidavits on July 29, stating that the checks were being issued that day.
Conn and Neff spoke on August 12, 2014, and Neff informed Conn that the checks had not arrived. Neff told Conn this meant the parties had not reached a binding settlement agreement. Conn offered to reissue new checks for overnight delivery, but Neff was unwilling to accept them. Conn nonetheless wrote to Neff’s office after their conversation, including settlement checks with the correspondence. She apologized, explaining that the original checks were issued on July 29 but there was an error in addressing them to Neff’s office. On August 14, Neff sent Conn a letter returning the checks and stating that the Woodards rejected Grange’s untimely response to the settlement offer and would be filing a lawsuit.
Grange filed a lawsuit against the Woodards in the United States District Court for the Northern District of Georgia. The one-count [850]*850complaint alleged breach of the settlement contract and sought relief “up to and including an award of specific performance.” The parties filed cross-motions for summary judgment. The Woodards argued that the parties did not reach a settlement agreement because the demand letter required Grange to remit payment timely as a condition of acceptance, which Grange failed to satisfy. Grange argued that Georgia law rendered void the Woodards’ attempt to require timely payment as a condition of acceptance. Both parties cited OCGA § 9-11-67.1, which provides in relevant part as follows:
(a) Prior to the filing of a civil action, any offer to settle a tort claim for personal injury, bodily injury, or death arising from the use of a motor vehicle and prepared by or with the assistance of an attorney on behalf of a claimant or claimants shall be in writing and contain the following material terms:
(1) The time period within which such offer must be accepted, which shall be not less than 30 days from receipt of the offer;
(2) Amount of monetary payment;
(3) The party or parties the claimant or claimants will release if such offer is accepted;
(4) The type of release, if any, the claimant or claimants will provide to each releasee; and
(5) The claims to be released.
(b) The recipients of an offer to settle made under this Code section may accept the same by providing written acceptance of the material terms outlined in subsection (a) of this Code section in their entirety.
(c) Nothing in this Code section is intended to prohibit parties from reaching a settlement agreement in a manner and under terms otherwise agreeable to the parties.
(d) Upon receipt of an offer to settle set forth in subsection (a) of this Code section, the recipients shall have the right to seek clarification regarding terms, liens, subrogation claims, standing to release claims, medical bills, medical records, and other relevant facts. An attempt to seek reasonable clarification shall not be deemed a counteroffer.
(g) Nothing in this Code section shall prohibit a party making an offer to settle from requiring payment within a [851]*851specified period; provided, however, that such period shall be not less than ten days after the written acceptance of the offer to settle.
The district court agreed with the Woodards that the statute does not prohibit a party from requiring payment as a condition of acceptance, and found that Grange did not satisfy the Woodards’ terms of acceptance through written acceptance alone. The district court also rejected Grange’s argument that even if payment was an essential element of acceptance, the insurer had satisfied that provision when it issued settlement checks payable to the Woodards in a timely manner. The district court denied Grange’s motion for summary judgment and granted summary judgment to the Woodards.
Grange appealed to the Eleventh Circuit, which concluded that OCGA § 9-11-67.1 was “arguably ambiguous with respect to its requirements.” Grange Mut. Cas. Co. v. Woodard, 826 F3d 1289, 1300 (11th Cir. 2016). On the one hand, the court observed, the statute appears to contemplate that an offeree will accept an offer in writing, such that payment would be a term of contract performance, not contract formation. Id. On the other hand, the court continued, subsection (c) arguably permits the parties to reach an agreement as they see fit, including “by contracting around” the procedure set forth in subsections (a) and (b). Id. Noting there were no published state or federal court decisions interpreting OCGA § 9-11-67.1, id. at 1299, the Eleventh Circuit certified the following questions to this Court:
(1) Under Georgia law and the facts of this case, did the parties enter a binding settlement agreement when the insurer Grange accepted the Woodards’ offer in writing?
(2) Under Georgia law, does OCGA § 9-11-67.1 permit unilateral contracts whereby offerors may demand acceptance in the form of performance before there is a binding, enforceable settlement contract?
(3) Under Georgia law and the facts of this case, did OCGA § 9-11-67.1 permit the Woodards to demand timely payment as a condition of accepting their offer?
(4) Under Georgia law and the facts of this case, if there was a binding settlement agreement, did the insurer Grange breach that agreement as to payment, and what is the remedy under Georgia law? Id. at 1300-1301.
[852]*8522. Analysis
a. Background principles of law
The Eleventh Circuit’s certified questions call on us to interpret key provisions of OCGA § 9-11-67.1.1
When we consider the meaning of a statute, we must presume that the General Assembly meant what it said and said what it meant. To that end, we must afford the statutory text its plain and ordinary meaning, we must view the statutory text in the context in which it appears, and we must read the statutory text in its most natural and reasonable way, as an ordinary speaker of the English language would. . . . [I]f the statutory text is clear and unambiguous, we attribute to the statute its plain meaning, and our search for statutory meaning is at an end.
Deal v. Coleman, 294 Ga. 170, 172-73 (1) (a) (751 SE2d 337) (2013) (citations and punctuation omitted). Additionally, “[a]ll statutes are presumed to be enacted by the legislature with full knowledge of the existing condition of the law and with reference to it. They are therefore to be construed in connection and in harmony with the existing law[.]” Botts v. Southeastern Pipe-Line Co., 190 Ga. 689, 700-01 (10 SE2d 375) (1940) (citation and punctuation omitted). This principle is critical to our understanding of the statute.
In enacting OCGA § 9-11-67. l,theGeneral Assembly actedagainst the backdrop of a large body of law on contract formation generally and settlement formation specifically As part of that existing law, “settlement agreements must meet the same requirements of formation and enforceability as other contracts.” Torres v. Elkin, 317 Ga. App. 135, 141 (2) (730 SE2d 518) (2012). There is no enforceable settlement between parties absent mutual agreement between them. Id. To that end,
an answer to an offer will not amount to an acceptance, so as to result in a contract, unless it is unconditional and identical with the terms of the offer. To constitute a contract, the offer must be accepted unequivocally and without variance of any sort. Apurported acceptance of a plaintiff’s settlement offer which imposes conditions will be construed as a counteroffer to the offer to settle for the policy limits.
[853]*853Frickey v. Jones, 280 Ga. 573, 574 (630 SE2d 374) (2006) (quoting Herring v. Dunning, 213 Ga. App. 695, 698 (446 SE2d 199) (1994) (citation and punctuation omitted)). These basic contract law principles find their origin in the common law. See 2 William Blackstone, Commentaries on the Laws of England 899 n.19 (William Draper Lewis ed., 1902) (“[A]n implied contract only differs from an express contract in the mode of proof; both equally proceed upon the mutual agreement of the parties, and cannot exist without it.”); see also Tucker v. Howard L. Carmichael & Sons, Inc., 208 Ga. 201, 203 (1) (65 SE2d 909) (1951) (“This court regards Blackstone as an authority on the common law.”).
Similarly, it is also a fundamental principle of contract law that “an offeror is the master of his or her offer, and free to set the terms thereof.” Atkinson v. Cook, 271 Ga. 57, 58 (518 SE2d 413) (1999) (citing Restatement (Second) of Contracts, § 59, cmt. (a) (1981)). This principle also finds its origin in the common law. See Packgen v. Berry Plastics Corp., 973 FSupp.2d 48, 62 (D. Me. 2013) (referring to “(t)he common law idea that the offeror is the master of the offer”) (quoting Corbin on Contracts § 3.8 (2013)). An offer ordinarily may contemplate acceptance by the doing of some act, as opposed to a mere oral or written statement of acceptance of certain terms. See Frickey, 280 Ga. at 575 (insurer’s response to plaintiff’s offer to settle required an additional act necessary to acceptance of the plaintiff’s offer — the resolution of all actual and potential liens of health care providers — and thus constituted a counteroffer); Douglas v. Austin-Western Road Mach. Co., 180 Ga. 29, 32 (1) (177 SE 912) (1934) (“An offer may contemplate acceptance by the doing of an act, and if the act be performed while the offer is in life, a binding contract is created, so far as the question of mutuality is concerned.”); Kitchens v. Ezell, 315 Ga. App. 444, 447-49 (1) (a) (726 SE2d 461) (2012) (rejecting defendants’ argument that presentation of certain bodily injury release was a condition of performance, not acceptance). The concept of a “unilateral contract,” whereby an offer calls for acceptance by an act rather than by communication, also has common law origins. See Doss v. Epic Healthcare Mgmt. Co., 901 SW2d 216, 220 (Mo. Ct. App. 1995); see also Friedrich Kessler et al., Contracts: Cases and Materials 370-71 (3ded. 1986) (quoting Sixth Interim Report of the EnglishLaw Revision Committee 23 (1937)).2
[854]*854b. Consideration of OCGA § 9-11-67.1
“The common-law rules are still of force and effect in this State, except where they have been changed by express statutory enactment or by necessary implication.” Humphreys v. State, 287 Ga. 63, 70 (4) (694 SE2d 316) (2010) (citation and punctuation omitted). Considered in this light, we conclude that the plain language of OCGA § 9-11-67.1 does not expressly or by necessary implication contravene these common law principles. Specifically, we cannot conclude that the statute displaced these common law principles by precluding Pre-Suit Offers from requiring terms in addition to those set forth in subsection (a), including requiring prompt payment as a condition of acceptance. Rather, subsection (a) merely sets forth five terms that, at a minimum, must be included in every Pre-Suit Offer. This is so for several reasons.
First, subsection (a) provides that a Pre-Suit Offer “shall . . . contain the following [five] material terms.” Although “contain” may sometimes be a term of exclusivity, it also has non-exclusive meanings. See, e.g., Webster’s II New College Dictionary, 249 (3d ed. 2005) (defining “contain” variously as “[t]o have within” and “[t]o have as component parts”). Although these different definitions create some ambiguity in the abstract, in considering how a word is used in a statute, “we must view the statutory text in the context in which it appears[.]” Deal, 294 Ga. at 172 (1) (a) (citation omitted). And the Georgia Code contains3 many examples of statutes that use the word “contain” in a context that clearly demonstrates that term is being used in a non-exclusive sense. See, e.g., OCGA § 12-5-27.1 (declaring unlawful the retail sale or use of “any cleaning agent containing phosphorus,” subject to exceptions such as products that “[c]ontain phosphorus in an amount not exceeding 0.5 percent by weight which is incidental to manufacturing”); OCGA § 9-3-30.1 (reviving or extending statute of limitations for certain actions against manufacturers and suppliers of “asbestos or material containing asbestos”); OCGA § 26-2-378 (requiring restaurants’ disclosure of “meat products” that [855]*855“contain extenders” such as textured vegetable protein, while providing that Code section does not apply to serving of meat products that “do not contain such an amount of extenders” as to require additional labeling in accordance with other laws). And here, part of the context of OCGA § 9-11-67.1 is the common law of contracts discussed above. Subsection (a) does not expressly limit Pre-Suit Offers to allow only the five terms listed therein; it reasonably can be read to require merely that every Pre-Suit Offer include, at a minimum, those five terms. Given that under the common law an offeror is free to set the terms of his or her offer, we read subsection (a) in this fashion, in harmony with the existing law: every Pre-Suit Offer must contain the five enumerated terms, but additional terms are not prohibited.
Subsection (g) bolsters this reading. It provides, “Nothing in this Code section shall prohibit a party making an offer to settle from requiring payment within a specified period; provided, however, that such period shall be not less than ten days after the written acceptance of the offer to settle.” This shows that prompt payment may be a term of settlement in a Pre-Suit Offer, as long as the offeror gives the recipient of the offer at least ten days from the time of written acceptance to make the payment. And, because prompt payment is not one of the terms listed in subsection (a), subsection (g) demonstrates that, as a more general matter, a Pre-Suit Offer may include terms other than those listed in subsection (a).
Additionally, subsection (c) provides, “Nothing in this Code section is intended to prohibit parties from reaching a settlement agreement in a manner and under terms otherwise agreeable to the parties.” Given the mandatory language of subsection (a) specifying terms that “shall” be included in a Pre-Suit Offer, the most natural reading of this provision is that the statute does not preclude a Pre-Suit Offer from requiring acceptance of terms in addition to those set forth in subsection (a). And the use of the word “manner” in subsection (c) indicates that not only are additional “terms” permissible, but a claimant may ask the recipient of a Pre-Suit Offer to do something to accept the offer beyond stating the recipient’s acceptance in writing.
Emphasizing the language of subsection (b), Grange argues that the statute plainly provides that if a Pre-Suit Offer contains the five terms listed in subsection (a), and those five terms are accepted unequivocally, without alteration, and in writing, then a settlement is created (at least where the demand is made pursuant to the statute explicitly). Subsection (b) provides that a recipient of “an offer to settle made under this Code section may accept the same by providing written acceptance of the material terms outlined in subsection (a) of this Code section in their entirety.” We agree that this language [856]*856means that a Pre-Suit Offer must be accepted in writing, at least as to the five terms listed in subsection (a). We do not agree that this language means that a Pre-Suit Offer cannot also require some additional act to effectuate acceptance, however. As set forth above, the common law is well established that (1) the offeror is the master of his or her offer, and (2) agreement requires a meeting of the minds on all material terms. Reading the statute consistent with those principles, we do not equate the phrase “written acceptance” with necessarily effectuating a binding settlement, as the dissent does. Rather, written acceptance of Pre-Suit Offers is necessary to effectuate a binding settlement, but whether it is sufficient depends on the offer; if the recipient of a Pre-Suit Offer is asked to do something more to accept, the parties do not have a meeting of the minds if the recipient does not also perform that action. Subsection (b) does not explicitly forbid a Pre-Suit Offer from requiring an additional action to accept the offer. It thus does not expressly contravene those common law principles.
The statute, including subsection (b), does not contravene those principles by necessary implication, either. Grange argues that to allow one making a Pre-Suit Offer to demand terms other than those set forth in subsection (a) or to require means of acceptance in addition to written acceptance would render the statute meaningless, particularly robbing subsections (a) and (b) of any force or effect. It is true that “a legislative body should always be presumed to mean something by the passage of an act, and an act should not be so construed as to render it absolutely meaningless[.]” Scott v. Mayor & Council of Mt. Airy, 186 Ga. 652, 653-54 (2) (198 SE 693) (1938) (citations and punctuation omitted). But our interpretation does not leave the statute without meaning.
In understanding the work that OCGA § 9-11-67.1 performs, it is helpful to recall the legal environment in which it was enacted. Our 1992 decision on an insurer’s duty to its insured when faced with a settlement demand, Southern Gen. Ins. Co. v. Holt, 262 Ga. 267, 268 (1) (416 SE2d 274) (1992),4 spawned much litigation over, among other things, what constitutes an offer to which an insurer must [857]*857respond,5 when an insurer’s inquiry about medical liens amounts to a counteroffer,6 and how much time an offeror must provide for a response in order to trigger an insurer’s duty to respond.7 OCGA § 9-11-67.1 speaks to those issues. In subsection (a), OCGA § 9-11-67.1 sets forth certain terms that, at a minimum, must be included in a Pre-Suit Offer, and, in subsection (b), sets forth how those terms must be accepted. OCGA § 9-11-67.1 provides in subsection (d) that the recipient of a Pre-Suit Offer may seek “reasonable clarification” on the topic of liens and other terms without transforming what would otherwise be an acceptance into a counteroffer. In subsections (a) (1) and (g), OCGA § 9-11-67.1 sets minimum time frames that a Pre-Suit Offer must allow for acceptance and payment, respectively, cabining a claimant’s ability to “set up” an insurer for a bad faith claim with unreasonably short deadlines. Far from rendering subsection (g) “meaningless,” as the dissent argues, our reading of subsection (g) does prevent plaintiffs from presenting settlement offers with “impossible deadlines.” Indeed, the insurance company that is a party to this case purported to comply with the ten-day payment deadline provided by the Woodards — and apparently would have complied but for an administrative error. Under our reading, the statute effectuates real and meaningful changes to, or at least helpful clarifications of, the existing law.8
[858]*858Grange suggested at oral argument that, as long as the claimant “invokes” OCGA § 9-11-67.1 in making his or her offer, the claimant is not entitled to make a “non-conforming offer,” i.e., one that has terms additional to those set forth in subsection (a).9 We disagree. Nothing in the text of the statute supports a reading that OCGA § 9-11-67.1 applies only to some Pre-Suit Offers. Although the statute refers to “an offer to settle made under this Code section[,]” the language of subsection (a) is mandatory (“any offer . . . shall be in writing and contain the following material terms . . This demonstrates that the references to offers made pursuant to the Code section is a shorthand for the sorts of offers to which the statute applies, as set forth in subsection (a) — pre-suit offers made to settle claims for personal injury arising from the use of a motor vehicle, prepared by or with the assistance of an attorney on behalf of a claimant. And our reading of subsection (a) defeats Grange’s definition of “non-conforming” — merely adding terms does not take the offer beyond subsection (a)’s scope.
3. Response to certified questions
For the foregoing reasons, we answer Question (2) in the affirmative. Yes, OCGA § 9-11-67.1 permits “unilateral” contracts whereby Pre-Suit Offers may demand acceptance in the form of performance (in addition to the statutorily mandated written acceptance) before there is a binding enforceable settlement contract. And, with respect to the general issue of law behind Question (3) (although we decline to consider it in the context of the facts of this case), we conclude that OCGA § 9-11-67.1 does not preclude a Pre-Suit Offer from demanding timely payment as a condition of acceptance. However, we respectfully decline to answer the Eleventh Circuit’s questions to the extent that they call us to decide the ultimate issues in the case, i.e., Question (1), which asks whether the parties entered into a binding settlement agreement, and Question (4), which asks about the consequences if the parties did reach an agreement. See PNC Bank, Nat. [859]*859Assn. v. Smith, 298 Ga. 818, 819 n.4 (785 SE2d 505) (2016) (“We do not reach the merits of the underlying case; instead, we answer the questions posed to us only in a general sense, not as applied to the specific facts and circumstances of this ongoing litigation in federal court.”).
Certified questions answered in part.
All the Justices concur, except Melton, P. J., and Blackwell, J., who dissent.