Non-technical abstractSustainable access to outer space is increasingly threatened by growing orbital clouds of satellites and debris. A boom in competitively priced commercial rocket launches has lowered prices, prompting satellite operators to begin deploying thousands of satellites. Six decades ago, ‘hard law’ international treaties established governance for outer space designed for the few governmental space programmes. Today, non-governmental commercial entities are operating under voluntary ‘soft law’ rules of the road that expose the deficiencies of the original treaties to empower regulatory supervision of the expanding commercial orbital presence. This paper suggests how a ‘sustainable’ system of governance, required for sustainable space access and exploration, may be promoted by increasing the costs of non-compliance.