FEDERAL COMMUNICATIONS COMMISSION PRESS RELEASE Washington, D . C, (41464) USE OF AMATEUR PORTABLE TRANSMITTERS FOR LONG DISTANCE COMMUNICATION BANNED June 7, 1940 Supplementing its recent order prohibiting amateur radio communication with foreign countries, the Federal Communications Commission today imposed an immediate ban on the use of all amateur portable and other amateur mobile stations operating in the continental United States, its territories and possessions except those stations using short-range frequenciesabove 56,000 kilocycles and except in the case of amateurs operating portable stations on June 22 and 23, 1940, in connection with the A.R.R.L . Field Day tests of portable transmitters which are designed for special use in time of emergency. Several thousand stations are affected by the terms of this order ; however, they did not operate regularly . Any amateur licensed by the Commission has been allowed to operate a portable station provided that advance notice, in writing, is given to the Commission inspector in charge of the district in which such operation is contemplated, Under suspended rules and regulations, this type of operation is now restricted indefinitely to the frequencies which, generally speaking, do not carry farther than the line of sight .