The International Academy of Astronautics (IAA) has approved a revised Declaration of Principles for the astronomy-based Search for Extraterrestrial Intelligence, marking the first major update to its post-detection protocols in more than 15 years. The new document responds to a scientific environment transformed by technosignature research, artificial intelligence, social media and global communication.

The original declaration was adopted in 1989 and revised in 2010, when SETI research was still centred largely on radio signals. The updated version recognises that potential evidence of extraterrestrial technology may now emerge across the electromagnetic spectrum, including optical laser emissions, infrared heat signatures from large-scale structures, and multi-messenger signals.

According to professor Michael Garrett, chair of the IAA SETI Committee, the information landscape has become far more complex than it was during the last revision. The new principles are intended to help researchers maintain scientific rigour before making any public claims. A central rule remains unchanged: extraordinary claims require extraordinary evidence. Institutions are encouraged to answer reasonable questions about their work, but a possible detection should be announced only after rigorous verification and consultation with the scientific community and the United Nations.

The declaration also addresses risks that were less prominent in earlier versions. These include viral misinformation, hoaxes, confusion caused by terrestrial interference, and the protection of scientists from harassment or intense media pressure after a possible discovery. It further reaffirms the “No reply” principle, stating that no response to a confirmed extraterrestrial signal should be sent until international consultation has taken place.

The IAA SETI Committee will now establish a permanent post-detection subcommittee with experts in social science, law, and long-term societal implications.

Follow the link to read the full document.