Introduction

Space-Based Solar Power Regulation refers to the legal framework governing the development, launch, operation and decommissioning of solar-power systems located in outer space that transmit collected energy to Earth. Such systems may use satellites equipped with large solar arrays to collect sunlight and transmit energy through microwave or laser beams to receiving stations on the ground. Unlike terrestrial solar installations, space-based solar power (SBSP) can potentially collect sunlight for extended periods without interruptions caused by night-time conditions or ordinary weather.

SBSP presents significant opportunities for future energy security, renewable electricity generation and international cooperation. However, it raises complex legal questions concerning outer-space activities, satellite registration, orbital congestion, radio-frequency interference, liability for damage, environmental protection, national security and cross-border electricity transmission. Because no comprehensive global treaty specifically governs commercial SBSP, its regulation depends on existing space law, telecommunications rules, national legislation and international cooperation.

Legal Framework Governing Space-Based Solar Power

1. Outer Space Treaty, 1967

The Outer Space Treaty is the principal international instrument governing activities in outer space. Article I establishes that exploration and use of outer space must benefit all countries and be conducted for the benefit and interests of all states. Article II prohibits national appropriation of outer space by sovereignty claims. Article VI makes states internationally responsible for national space activities, including those carried out by non-governmental entities, which require authorisation and continuing supervision by the appropriate state.

Article VII establishes an international liability principle for damage caused by space objects, while Article IX requires states to conduct activities with due regard for the corresponding interests of other states and to avoid harmful contamination and harmful interference.

Regulatory significance: A private company cannot treat an SBSP satellite as an entirely unregulated commercial asset. The relevant state must exercise appropriate authorisation and supervision, and the project must respect applicable international obligations.

2. Liability Convention, 1972

The Convention on International Liability for Damage Caused by Space Objects establishes liability rules for damage caused by space objects. Under Article II, a launching state bears absolute liability for damage caused by its space object on the surface of the Earth or to aircraft in flight. Article III generally applies fault-based liability to damage caused elsewhere than on the Earth's surface to another state's space object or persons or property aboard it.

For SBSP, possible incidents include launch failures, falling satellite components, damage to another spacecraft and accidents involving associated space infrastructure. Whether a particular energy-transmission incident falls within the Convention depends on the facts, the definition of a space object and the applicable legal framework.

The Convention does not establish a complete compensation regime for every commercial loss, interruption of electricity supply or environmental consequence associated with SBSP.

3. Registration Convention, 1975

The Convention on Registration of Objects Launched into Outer Space requires participating states to maintain records of space objects and provide specified information to the United Nations.

Registration is important for identifying the state associated with a satellite and supporting the implementation of international space-law obligations. An SBSP project involving multiple satellites, orbital platforms or associated space infrastructure may require careful assessment of registration responsibilities.

Registration does not itself constitute permission to transmit electricity to Earth or authorisation to use a particular radio frequency.

4. International Telecommunication Union Regulation

The International Telecommunication Union (ITU) coordinates the international use of radio frequencies and satellite orbital resources under its Constitution, Convention and Radio Regulations.

Microwave-based SBSP systems may require spectrum coordination, frequency assignments and compliance with applicable interference protections. Laser-based transmission raises different technical and safety questions, although associated communications systems may still use regulated radio frequencies.

Ground receiving stations may also require national approvals concerning spectrum use, planning, electrical infrastructure and public safety. Coordination is particularly important where transmission beams or satellite operations could affect other states or communication systems.

National Regulation and Institutional Responsibilities

1. United States

In the United States, SBSP projects may involve several regulatory authorities. The Federal Communications Commission (FCC) regulates relevant communications and spectrum uses; the Federal Aviation Administration (FAA) oversees commercial launch and re-entry licensing; and other federal agencies may exercise authority over environmental review, national security and associated infrastructure.

The National Environmental Policy Act (NEPA) may require environmental review for qualifying federal actions. Its application depends on the proposed activity, federal involvement and relevant statutory requirements.

2. India

In India, space-based solar power would require assessment under the national space-activity authorisation framework, applicable telecommunications and spectrum rules, launch and satellite requirements, environmental law and electricity regulation.

The Indian National Space Promotion and Authorisation Centre (IN-SPACe) has an important role in authorising and promoting eligible non-governmental space activities under India's space-policy framework. The Department of Space and other competent authorities may also have relevant responsibilities.

The Electricity Act, 2003 and applicable electricity regulations may become relevant to terrestrial generation, transmission, distribution and sale of electricity produced through an SBSP system. However, the exact permissions would depend on the project's technical structure and commercial arrangements.