The DMZ is not a park: Why undermining armistice risks stability on Korean Peninsula

Chun In-bum

On Aug. 26, the ruling Democratic Party of Korea (DPK)'s Policy Committee Chair Han Jeong-ae introduced a proposed law titled the “Support for Peaceful Use of the DMZ (Demilitarized Zone).” The bill would allow peaceful non-military visits to the DMZ without prior approval from the United Nations Command (UNC). At present, all entry into the DMZ, regardless of purpose, requires UNC authorization. Han argues that this requirement unnecessarily restricts peaceful use and infringes on South Korean sovereignty, particularly because much of the DMZ south of the Military Demarcation Line lies on territory administered by the Republic of Korea. Under the proposal, access would be approved by South Korea’s Ministry of Unification, separate from the military provisions of the Armistice Agreement.

At first glance, the bill appears reasonable, even constructive. Who could object to peaceful use of one of the world’s most symbolically charged borders? Yet this framing obscures a deeper problem. The DMZ is not governed primarily by domestic administrative law or sovereignty claims. It is governed by an international military agreement designed to prevent war. Altering how that agreement is implemented, especially through unilateral domestic legislation, risks weakening the fragile legal and security architecture that has kept large-scale conflict at bay since 1953.

The Korean Armistice Agreement, signed on July 27, 1953, did not end the Korean War. It merely suspended active hostilities. No peace treaty followed. Despite its imperfections, the armistice remains the only binding legal framework preventing a resumption of full-scale war on the Peninsula. Central to that framework is the DMZ, a buffer zone deliberately removed from normal sovereign control and placed under the authority of the United Nations Command to prevent miscalculation, escalation and accidental clashes.

This authority is not incidental. Article I of the Armistice assigns responsibility for the establishment, administration, and control of the DMZ to the UNC. Over decades, this mandate has been consistently interpreted to cover all forms of access, military and non-military alike, because any presence in the DMZ carries an inherent security risk. The DMZ is not simply land south or north of a line — it is a specially governed space created by international agreement for one overriding purpose: to keep opposing forces apart and prevent the war from restarting.

From an international legal perspective, the proposed legislation raises serious concerns. Under the fundamental principle of pacta sunt servanda, that agreements must be honored, states are not free to unilaterally reinterpret or alter the implementation of binding agreements. This problem is compounded by a basic but often overlooked fact: South Korea is not a signatory to the Armistice Agreement. While Seoul is unquestionably the party most directly affected by the Armistice, modifying one of its core operational elements through domestic law would almost certainly be viewed by the international community as legally questionable.

Supporters of the bill argue that it separates peaceful civilian activity from military matters. This distinction may make sense politically, but it does not hold up operationally. In a zone designed to prevent armed confrontation, there is no such thing as activity without security implications. Civilian movement changes patterns of access, surveillance, response times and escalation dynamics. That is precisely why the armistice placed control under a neutral, multinational command rather than any single national authority.

The implications go beyond legal theory. The UNC is not merely a U.S.-led military venture. It is a multinational command established pursuant to United Nations Security Council resolutions. Its authority under the armistice provides part of the international legal foundation for the U.S. and allied military presence in Korea. Measures that sideline or erode the UNC’s role risk introducing ambiguity into deterrence and crisis management, areas where ambiguity is dangerous, not stabilizing.

There is also an unavoidable strategic dimension. North Korea has long claimed that the armistice is already invalid and that the UNC lacks legitimacy. It has sought for decades to dismantle the armistice system in favor of a bilateral arrangement with the United States that excludes South Korea. Unilateral steps that weaken UNC authority, even unintentionally, lend credibility to this narrative. In a future crisis, it could complicate responsibility, response coordination and escalation control.

History offers sobering parallels. During the Cold War, access to divided Berlin was governed by a rigid four-power agreement. No party unilaterally rewrote the rules in the name of convenience or symbolism. In the Sinai Peninsula, peaceful use exists, but only under international supervision by the Multinational Force and Observers. Where buffer zones have been altered without consensus or oversight, the result has typically been greater instability, not trust.

Peaceful engagement is a legitimate aspiration. But peace is sustained not by gestures alone, but by institutions, rules and restraint. The DMZ has endured precisely because it is tightly regulated under an internationally recognized command structure. Treating it as ordinary sovereign space or as a venue for domestic political experimentation, misunderstands its function.

The DMZ is not a park, a museum or a confidence-building playground. It is the last physical and legal barrier between armistice and war. Weakening the framework that governs it, however well intentioned, risks eroding the very system that has preserved peace for more than seventy years. On the Korean Peninsula, that is a risk with consequences far beyond symbolism.

Retired Lt. Gen. Chun In-bum is the former commander of the Republic of Korea Army Special Warfare Command.