The 1967 Outer Space Treaty establishes that nations remain responsible for their space activities, including private commercial operations licensed under their jurisdiction. But the treaty was written for an era of widely-spaced missions, not the crowded lunar surface envisioned for the 2030s. It doesn't address rescue costs, equipment damage, or resource extraction conflicts.

NASA and international partners are developing safety zones—essentially keep-out areas around landing sites and operational infrastructure. The zones would be temporary and mission-specific, not permanent territorial claims. But even here, questions remain: How large should safety zones be? Can a nation declare an exclusion zone around a scientifically valuable crater? What if safety zones overlap?

Some nations favor an international lunar coordination authority, similar to air traffic control, to manage the increasingly crowded cislunar environment. Others, particularly the United States, prefer bilateral agreements and voluntary coordination to avoid creating an international bureaucracy that could slow mission approvals.

The commercial sector adds another layer of complexity. Private companies operating under national licenses might clash with government missions. If a commercial mining operation damages a national scientific installation, does the company's home country bear full liability? What if the company is chartered in one country but backed by investors from another?

China, which hasn't signed the Artemis Accords, is developing its own International Lunar Research Station framework with Russia and other partners. This parallel governance structure raises questions about coordination between the two lunar coalitions. The Moon risks becoming a patchwork of incompatible operating standards and legal frameworks.

The Artemis Accords Implementation Guidelines currently under development aim to translate broad principles into operational procedures. Working groups are hammering out protocols for communication standards, navigation safety, emergency response coordination, and yes—liability frameworks for when things go wrong.

But time is running short. Artemis III is scheduled for 2027, with multiple other missions planned in the same timeframe. The legal frameworks need to be in place before boots are on the ground, not negotiated in the aftermath of an incident.

The stakes extend beyond property damage or rescue costs. Poorly defined liability rules could create diplomatic incidents that threaten international cooperation in space—cooperation that's essential for tackling larger challenges like Mars exploration and asteroid defense.

In space exploration, as across technological frontiers, engineering constraints meet human ambition—and occasionally, we achieve the impossible. Building the rockets is the easy part. Building the international frameworks that make sustained lunar presence sustainable? That's the challenge we're only beginning to address.

The Moon is about to get crowded. The question is whether we'll have the rules in place to handle the inevitable conflicts before the first incident forces us to write them in crisis mode.