Kansas “Marketable Gas” After Cooper-Clark: Express Royalty Clauses Control; Marketability Is a Fact Question and the Marketable Condition Rule Is a Gap-Filler
1. Introduction
Case: Cooper-Clark Foundation v. Scout Energy Management (Supreme Court of Kansas, Sept. 11, 2026).
Posture: Certified question from the United States District Court for the District of Kansas under the Uniform Certification of Questions of Law Act, K.S.A. 60-3201 et seq.
Parties: Cooper-Clark Foundation (royalty owner/lessor, proposed class representative) versus Scout Energy Management, LLC, and affiliated entities (operators/working interest owners/lessees).
Business dispute: Whether Scout underpaid royalties by deducting midstream costs (processing-related services) that Cooper-Clark claims were necessary to render gas “marketable.”
The federal court asked the Kansas Supreme Court to clarify when, “under the Marketable Condition Rule,” a lessee’s obligation to make gas marketable at its own expense ends—at the point gas can be sold in some market to some purchaser, or only once it can be sold in the market where the lessee intends to sell and actually does sell (here, the interstate pipeline/tailgate market).
2. Summary of the Opinion
The court rejected both parties’ proposed categorical rules. It held that:
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Courts must first interpret each oil-and-gas lease according to its plain language to determine the parties’ allocation of costs affecting royalties.
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The marketable condition rule is not a free-standing override; it is a tool of construction used only when the lease is silent or ambiguous about the relevant cost allocation.
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“Marketable” is not categorical; marketability is an open factual question requiring case-by-case examination tied to the particular lease and surrounding circumstances.
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Royalty clauses using phrases like “proceeds if sold at the well” or “market value at the well” must be given effect; courts cannot “sidestep” them to expand the marketable condition rule beyond gap-filling.
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The point of intended or actual sale is relevant but is only one factor among others in assessing marketability.
The court expressly rejected Cooper-Clark’s “intended market theory” drawn from Cooper Clark Foundation v. Oxy USA Inc., and also rejected Scout’s contention that obligations are necessarily satisfied if the gas could theoretically be sold at the wellhead.
3. Analysis
3.1 Precedents Cited
A. Certification and scope of review
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Bruce v. Kelly, 316 Kan. 218, 223-24, 514 P.3d 1007 (2022): Cited for the principle that certified questions are questions of law reviewed without deference and confined to the certification order. This frames the opinion’s restraint: the court clarifies governing standards but does not resolve disputed facts in the underlying royalty litigation.
B. Implied duty to market (baseline doctrine)
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Robbins v. Chevron U.S.A., Inc., 246 Kan. 125, 131, 785 P.2d 1010 (1990) and Gilmore v. Superior Oil Co., 192 Kan. 388, 392, 388 P.2d 602 (1964): These anchor Kansas’ longstanding rule that once production exists in paying quantities, the lessee has an implied obligation to produce and market diligently unless the lease provides otherwise. The italicized limitation is central to Cooper-Clark—implied duties yield to express bargain.
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Adolph v. Stearns, 235 Kan. 622, 626, 684 P.2d 372 (1984): Cited to cabin implied duties—no implied duty to undertake unprofitable operations merely to benefit lessors. This supports the court’s refusal to adopt standards that could compel uneconomic marketing/processing paths untethered to the contract.
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Fawcett v. Oil Producers, Inc. of Kansas, 302 Kan. 350, 366, 352 P.3d 1032 (2015) (Fawcett I) and Smith v. Amoco Production Co., 272 Kan. 58, 84-85, 31 P.3d 255 (2001): Both emphasize that performance under the implied covenant to market is generally a question of fact measured by what an “experienced operator of ordinary prudence” would do with due regard for both sides’ interests. Cooper-Clark uses this to justify its fact-intensive, multi-factor marketability framework.
C. “Marketable condition rule” and post-production costs
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Gilmore v. Superior Oil Co., 192 Kan. 388, Syl. ¶ 3: Cited for the classic statement that when the marketable condition rule applies, necessary costs to make gas marketable cannot be charged to royalty owners.
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Sternberger v. Marathon Oil Co., 257 Kan. 315, Syl. ¶ 3, 894 P.2d 788 (1995): Cited for the complementary principle that once gas is marketable, reasonable costs to “transport or enhance” value may be shared with royalty owners (depending on lease terms). Cooper-Clark revisits Sternberger to show that “marketability” cannot be decided by a single proxy (sale location) and must be grounded in the contract and evidence.
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Coulter v. Anadarko Petroleum Corp., 296 Kan. 336, Syl. ¶ 10, 292 P.3d 289 (2013): Cited to reaffirm the primacy of express lease terms and to restate Sternberger’s conceptual split: (1) costs to produce and render marketable are on lessee; (2) after marketability, transportation and value-enhancement costs can be shared if the lease so allows.
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Matzen v. Hugoton Prod. Co., 182 Kan. 456, 321 P.2d 576 (1958): Raised in the federal court’s framing (through defendants’ argument). The Kansas Supreme Court did not rely on it in its reasoning, underscoring the opinion’s focus on the Sternberger/Fawcett line and on lease-text primacy.
D. The “at the well” valuation tradition and transportation-cost sharing
The court’s most detailed historical work connects “at the well” royalty language and market absence to cost allocation.
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Scott v. Steinberger, 113 Kan. 67, 213 P. 646 (1923): Used to show that where a lease is ambiguous about where value is fixed, courts examine surrounding circumstances (e.g., absence of pipelines at execution) and may anchor valuation at the connection point/wellhead. The opinion uses Scott to illustrate the interpretive move: when the text is unclear, context supplies intent.
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Voshell v. Indian Territory Illuminating Oil Co., 137 Kan. 160, 19 P.2d 456 (1933) and Molter v. Lewis, 156 Kan. 544, 134 P.2d 404 (1943): Both support proportionate sharing of reasonable transportation costs when a local market is absent and product must be moved to reach a market—again, tied to lease language and practical necessity.
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Sternberger v. Marathon Oil Co., 257 Kan. 315: Re-read through Scott/Voshell/Molter, Sternberger becomes not a broad “wellhead marketability” slogan but a lease-centered rule: when royalty is “market price at the well” and no wellhead market exists, netting back reasonable transportation can be appropriate; lack of a purchaser at the wellhead alone does not prove “unmarketable” absent evidence of required processing.
E. “Proceeds” vs “market value” and why words matter
F. Implied duties arise from, not against, the lease
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Monfort v. Lanyon Zinc Co., 67 Kan. 310, 72 P. 784 (1903): Cited to reinforce that courts do not invent obligations contrary to express lease provisions; parties’ express terms control.
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Howerton v. Kansas Nat. Gas Co., 81 Kan. 553, 106 P. 47 (1910): Used to explain the historical origin of implied development/marketing duties as arising from construing the lease “as a whole” to fulfill its purpose—while also acknowledging that if the writing truly requires a disappointing outcome, the contract governs. This is the opinion’s template for implied covenants: implied duties are interpretive, not free-floating equity.
G. Limiting “merchantable” reasoning to its contractual context
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Ely v. Wichita Nat. Gas Co., 99 Kan. 236, 161 P. 649 (1916): Cooper-Clark invoked Ely for language tying “merchantable” to suitability for an “intended” market. The court distinguished Ely as a downstream supply contract case about the meaning of “merchantable gas” in that contract—not about upstream lease-based implied duties. This distinction supports Cooper-Clark’s broader methodological point: “marketability” cannot be abstracted from the governing instrument and transaction type.
H. The Fawcett–Oxy dispute and the court’s correction
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Fawcett v. Oil Producers, Inc. of Kansas, 302 Kan. 350, 352 P.3d 1032 (2015) (Fawcett I): The court emphasizes that Fawcett I did not make interstate-pipeline condition (or downstream sale destination) the definition of marketable gas; it held that, given those leases’ “at the well” proceeds language and actual wellhead sales to third parties, the operator did not have a legal duty to bear post-sale downstream costs as a matter of law.
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Fawcett v. Oil Producers, Inc. of Kansas, 315 Kan. 259, 266, 507 P.3d 1124 (2022) (Fawcett II): Provides the key clarifying quote adopted here: “what it means to be marketable remains an open factual question—not ... a legal requirement that gas must be in interstate pipeline condition before it is marketable.” Cooper-Clark makes that clarification operational by rejecting categorical answers to the certified question.
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Cooper Clark Foundation v. Oxy USA Inc., 58 Kan. App. 2d 335, 347, 469 P.3d 1266 (2020) (“Oxy”): The Supreme Court rejects Oxy’s generalization that “when parties define a market for gas through their conduct, that gas is marketable when it is in a condition acceptable for that intended market.” The Supreme Court constrains that statement to the narrow Fawcett I scenario (leases calling for wellhead proceeds and actual wellhead sales) and refuses to let “intended market” become a universal definition.
3.2 Legal Reasoning
The opinion’s logic proceeds in three linked steps.
Step 1: Treat the lease as the primary law between the parties
The court restates a core Kansas oil-and-gas principle: cost allocation affecting royalties is first a matter of contract interpretation. If a lease expressly assigns the relevant costs or specifies the basis for royalty valuation (e.g., “proceeds if sold at the well” or “market value at the well”), that language must be enforced.
Step 2: Use the marketable condition rule only as a gap-filler
The court characterizes the marketable condition rule as a “tool of contract construction” that may fill a contractual gap when the lease is silent or ambiguous on the allocation of costs associated with making gas marketable. The court rejects attempts to use the rule to “sidestep” explicit royalty text—especially text pegging royalties “at the well.”
Step 3: Make “marketability” an evidence-based, lease-specific factual inquiry
Because marketability affects which costs are “pre-marketability” (borne by lessee) versus “post-marketability” (potentially shareable depending on lease terms), the court holds that marketability must be determined case-by-case. It then supplies an illustrative list of considerations:
- the lessee’s reasonable diligence in finding a market with due regard for both sides’ interests;
- location of the sale;
- condition of the gas when delivered to the purchaser;
- whether the purchaser accepted the gas in a good-faith transaction;
- terms of purchase agreements explaining marketing and pricing;
- whether a market existed at the wellhead;
- whether midstream services were necessary to sell the gas;
- whether those services made the gas marketable or merely transported/enhanced already marketable gas;
- industry practices and market conditions relevant to marketability or value.
Notably, this list is framed as non-exhaustive, signaling that trial courts must tailor the inquiry to the lease language and the commercial reality of the marketing chain.
3.3 Impact
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Doctrinal clarification: The decision closes off two oversimplifications that had traction in royalty disputes: (a) “marketability equals the market where the lessee actually sells” (the intended-market approach), and (b) “marketability exists if any hypothetical wellhead buyer could exist.” Kansas now explicitly requires a contextual, evidence-based determination.
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Contract primacy strengthened: By insisting that “proceeds if sold at the well” and “market value at the well” language cannot be “sidestepped,” the court increases the practical importance of careful lease taxonomy in royalty litigation and reduces the ability to litigate via a single generalized marketability theory.
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Class certification pressure: The opinion’s “case-by-case” marketability mandate—combined with the instruction to give effect to varied royalty clauses—will likely make statewide class treatment harder where leases materially differ and where marketability turns on varying gas quality, services, and marketing arrangements.
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Evidence focus on marketing arrangements: Purchase agreements, midstream contracts, and industry context become central, not peripheral. Parties should expect heavier discovery and expert testimony on whether specific services were necessary to reach a market or merely enhanced value after marketability.
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Drafting and negotiation signal: Lessors and lessees are on notice that Kansas courts will treat cost-allocation silence as an invitation to implied-rule gap-filling, but will treat express royalty language as controlling—even when that complicates uniform outcomes across a lease portfolio.
4. Complex Concepts Simplified
- Implied covenant to market
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A court-implied promise that the lessee will use reasonable diligence to find a market and sell production, measured by what a prudent operator would do while considering both lessor and lessee interests—unless the lease’s express terms say otherwise.
- Marketable condition rule
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A doctrine often summarized as: the lessee must bear the costs necessary to make production “marketable.” Cooper-Clark clarifies it is not automatic and not universal; it functions as a contract “gap-filler” when the lease does not clearly allocate the disputed costs.
- “At the well” royalty clauses
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Clauses that anchor royalty valuation at the wellhead (or treat wellhead sale proceeds as the royalty base). These clauses matter because they can imply “net-back” style valuation where downstream prices may be adjusted back to the well by subtracting certain post-marketability costs—depending on facts and other lease language.
- “Proceeds” vs “market value”
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“Proceeds” typically means actual sale money received; “market value” is a hypothetical fair market price. Kansas treats them as different royalty measures, and courts must respect how each lease uses them.
- Midstream services / post-production costs
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Services after extraction (e.g., gathering, compressing, dehydrating, treating, processing, transporting) that may be necessary to sell gas or may simply expand markets or increase price. Whether they are deductible from royalties depends on (1) when the gas became marketable and (2) what the lease says about valuation and cost sharing.
5. Conclusion
Cooper-Clark Foundation v. Scout Energy Management establishes a decisive Kansas clarification: the marketable condition rule is not a categorical destination-market standard and not a one-size-fits-all answer to cost deductions. Courts must (1) enforce the lease’s express royalty language (including “at the well” formulations), and only then (2) if the lease is silent or ambiguous on cost allocation, apply the marketable condition rule as a gap-filler through a fact-specific inquiry into when the gas became marketable.
The practical consequence is a shift away from abstract definitions of “marketable gas” and toward disciplined, instrument-centered adjudication grounded in the specific lease text, the marketing chain, and the commercial facts of each well or group of similarly situated leases.