This definition appears very rarely
Samples in periodicals archive:
IHS - Local Authority and Emergency Service Information (LAESI) 4th Edition - Defence Nuclear Materials Transport Contingency Arrangements
the Department published the second edition of its document "Local Authority and Emergency Service Information on Nuclear Weapon Transport Contingency Plans"...
Ministry of Defence. Local authority and emergency service information on nuclear weapons transport contingency plans (LAESI). 3rd edn. London: MOD, 1996.