ABSTRACT
Some consider a search for Extra-Terrestrial Intelligence (ETI) proof of the lunacy of those who undertake it.1 Others see it as a matter of amusement, tolerable as a harmless if puzzling hobby. In both attitudes there is usually also concern that public funds should not be used for the endeavour.2 However, the matter goes beyond such reactions. Searches for ETI are under way and must now be considered in any exposition of general space law. Legal commentators have set down their thoughts on the matter and recent years have seen the development of Protocols setting down mechanisms for the announcement of the detection of ETI and for the framing of a possible reply, if such is appropriate.
