With Guyana set to commemorate its 60th Independence anniversary on May 26, mathematician, professor and public intellectual Dr. Terrence Blackman is warning that the nation’s sovereignty is being fundamentally tested by its handling of ExxonMobil Guyana Limited’s offshore oil liabilities and the recent Court of Appeal ruling overturning Justice Sandil Kissoon’s landmark parent company guarantee decision.
In a detailed essay published Sunday in the Guyana Business Journal titled “The Price of Sovereignty: What the Court of Appeal Did Not Say, What the Permit Already Said, and What the Next Parliament Must,” Blackman argued that the legal and financial framework currently governing Guyana’s oil sector leaves the country dangerously exposed in the event of a catastrophic offshore oil spill.
“A nation about to mark the sixtieth anniversary of its independence may reasonably be expected to give some thought to what independence actually means,” Blackman wrote.
“But sovereignty is not a parade. Sovereignty is the capacity of a people to set the terms on which strangers extract their wealth, to compel performance against power, and to ensure that the obligations conferred upon those not yet born are obligations they would themselves have chosen.”
Blackman’s intervention follows the May 7, 2026 ruling by the Guyana Court of Appeal, which unanimously overturned Justice Kissoon’s 2023 decision requiring ExxonMobil Guyana Limited to provide an unlimited parent company guarantee to cover all costs arising from an offshore oil spill.
The three-member appellate panel — Justices Dawn Gregory, Nareshwar Harnanan, and Priya Sewnarine-Beharry — ruled that while ExxonMobil remains liable for environmental damage caused by its offshore petroleum operations, the Liza Phase One Environmental Permit did not explicitly require an “unlimited” guarantee.
The court held that “unlimited liability” and “financial assurance” are legally different concepts and found that Justice Kissoon erred by effectively inserting the word “unlimited” into the permit through judicial interpretation. The judges further ruled that the Environmental Protection Agency (EPA) possesses statutory discretion under the Environmental Protection Act and the environmental permit to determine the appropriate level of financial assurance and that the lower court improperly substituted its judgment for that of the regulator.
The ruling also found that neither the Environmental Protection Act nor the permit expressly referred to an unlimited guarantee and concluded that ExxonMobil and the EPA did not act improperly in negotiating the existing arrangement.
As a result, the Court of Appeal set aside Justice Kissoon’s orders requiring an unlimited parent company guarantee, overturned directives for enforcement action against ExxonMobil, and removed the possibility of permit suspension tied to unlimited coverage.
The decision effectively leaves intact the current financial assurance structure consisting of a US$2 billion parent company guarantee and a US$600 million per-incident insurance policy.
But Blackman argued that the central issue is not merely legal interpretation, but whether Guyana’s current protections are remotely adequate when measured against the scale of the potential risk.
“On the narrow legal question of whether Justice Kissoon was entitled to inscribe a word by interpretation, reasonable jurists can differ,” Blackman stated.
“On the question that actually matters — whether what now stands in place of the Kissoon ruling is adequate to the risk Guyana is now carrying — the answer is no.”
The essay situates the debate within broader questions of sovereignty, economic power, and the ability of a small developing state to hold multinational oil corporations fully accountable.
Blackman pointed to the stark disparity between ExxonMobil’s global financial capacity and Guyana’s own economic size.
According to figures cited in the essay, ExxonMobil recorded approximately US$332.2 billion in total revenue in 2025, while Guyana’s nominal GDP in 2024 stood at US$24.7 billion.
He also referenced the estimated US$145 billion economic impact associated with the Deepwater Horizon disaster in the Gulf of Mexico, arguing that Guyana’s current US$2 billion guarantee is woefully insufficient against the scale of potential catastrophe.
Central to Blackman’s argument is his contention that the parent company guarantee (PCG) is not simply one regulatory mechanism among many, but the only instrument capable of directly reaching ExxonMobil Corporation itself.
“The parent company guarantee is not one financial assurance mechanism among several,” he wrote.
“It is the only instrument in the entire architecture that reaches the balance sheet of ExxonMobil Corporation itself.”
Blackman challenged claims by some analysts that Guyana’s broader legal and regulatory framework — including the Petroleum Activities Act 2023 and the Oil Pollution Prevention, Preparedness, Response and Responsibility Act 2025 — sufficiently protects the country.
Instead, he argued that all those laws and safeguards ultimately regulate ExxonMobil Guyana Limited, a local operating subsidiary with relatively limited assets.
“Every layer of the framework… operates on the same asset-light operating subsidiary,” Blackman wrote.
He warned that the structure is deliberately designed to insulate ExxonMobil’s parent corporation from catastrophic liability.
“A subsidiary structured to be judgment-proof against catastrophic liability is not an accident of corporate housekeeping,” he argued.
“It is a deliberate legal architecture, common across the industry, designed precisely to ring-fence the parent from the liabilities of the operation.”
According to Blackman, the PCG is “the one instrument that pierces that veil.”
“It is not interchangeable with the rest,” he stated. “It is the rest’s only backstop.”
Blackman acknowledged differing legal interpretations surrounding the appeal ruling but ultimately sided with concerns that the current framework leaves Guyana carrying disproportionate environmental and financial risk relative to its size and institutional capacity.
His warning comes at a time when Guyana is earning billions annually from offshore oil production while simultaneously confronting growing questions about environmental vulnerability, regulatory oversight, and whether the country possesses the institutional strength to manage the long-term consequences of the oil boom.
In Blackman’s view, the issue ultimately transcends environmental law and enters the realm of national destiny.
“Sixty years is long enough for that capacity to be tested,” he wrote.
“It is also long enough for the test to have a clear answer.”
