It has been suggested that there may be a trend in international law toward the emergence of a right to proclaim and enforce a contiguous zone of unspecified extent for the prevention of electronic reconnaissance by foreign vessels.
Lissitzyn, Oliver J.
"Electronic Reconnaissance From the High Seas and International Law,"
Naval War College Review: Vol. 23
, Article 6.
Available at: http://digital-commons.usnwc.edu/nwc-review/vol23/iss2/6