SCAPIN-1166: CONTROL OF RADIO COMMUNICATIONS
GENERAL HEADQUARTERS
SUPREME COMMANDER FOR THE ALLIED POWERS
APO 500
29 August 1946
AG 676.3
(29 Aug 46)
CCS
(SCAPIN-1166)
| MEMORANDUM FOR | IMPERIAL JAPANESE GOVERNMENT. |
|---|---|
| THROUGH | Central Liaison Office, Tokyo. |
| SUBJECT | Control of Radio Communications. |
1. The frequency assignments for authorized Japanese radio stations recommended by the Ministry of Communications are approved.
2. Inclosure 1 lists the recommended and approved frequency assignments, and Inclosure 2 lists definitions and abbreviations pertaining to those frequency assignments.
3. The approved frequency assignments will become effective 0001H, 25 August 1946. Operation of radio stations or use of frequencies other than those listed in Inclosure 1 will be discontinued on or before 1 October 1946.
4. Limitations under which the recommended frequency assignments were approved are stated in Inclosure 3. The Imperial Japanese Government will take the necessary action required to insure strict compliance with these limitations by all radio stations.
5. Additions, deletions or changes to the approved frequency assignments shown in Inclosure 1 will be made in accordance with the provisions of Memorandum for the Imperial Japanese government, file AG 676.3 (20 Nov 45)CCS, (SCAPIN321), dated 20 November 1945, subject: "Control of Radio Communications."
6. The Imperial Japanese Government will require that a station license be issued to each radio station listed in Inclosure 1. The license will bear the SCAP REGISTRY NO. appearing in the first column of the "List of Assigned Frequencies", A license will be issued to additional radio stations only when operation of such stations is authorized by the Ministry of Communications and the authorization approved by the Civil Communications Section, General Headquarters, Supreme Commander for the Allied Powers. Licenses will be printed in both Japanese and English language. Licenses will be issued to authorized radio stations prior to 1 October 1946, and will be posted in a conspicuous place in the transmitter room of the licensed station.
7. The Imperial Japanese Government will require that all authorized radio stations be dismantled prior to 15 October 1946. Component parts of dismantled stations may be stored by the agency concerned and used as replacement equipment for authorized stations. The following classes of radio stations are authorized in Japan effective 1 October 1946.
a. Radio stations operated by Japanese agencies for the Occupation Forces.
b. Radio stations included in the approved frequency assignment list (inclosure 1).
c. Specific radio stations for which authority for retention is obtained from General Headquarters, Supreme Commander for the Allied Powers prior to 10 September 1946.
8. The assignment of the frequencies listed in Inclosure 1 which are marked. "For Assignments to Ships", will be covered by separate correspondence.
9. Direct correspondence is authorized between the Civil Communications Section, General Headquarters, Supreme Commander for the Allied Powers, and the Japanese Ministry of Communications on matters within the scope of this memorandum.
FOR THE SUPREME COMMANDER:
JOHN B. COOLEY,
Colonel, AGD,
Adjutant General.
3 Incls
1. List of frequencies assigned
for use by Japanese Government
2. Definitions and abbreviations
3. Limitations
(To addressee only)
GENERAL HEADQUARTERS
SUPREME COMMANDER FOR THE ALLIED POWERS
APO 500
29 August 1946
MEMORANDUM.
SUBJECT: Information of General Application Pertaining to Directive Number (SCAPIN - 1166), file AG 676.3 (29 Aug 46) CCS, this Headquarters, dated 29 August 1946, subject: "Control of Radio Communications."
1. With reference to subject memorandum, the following is published for the information of all concerned.
2. A study of frequency assignments made by the Japanese Ministry of Communications indicated that assignment of frequencies to Japanese Radio Stations had been made indiscriminately and with no organized attempt to coordinate their joint or simultaneous use.
3. Continued use of frequencies formerly assigned to radio stations has been permitted until a satisfactory plan could be devised and implemented whereby a complete new frequency allocation to the Japanese Government and assignment to radio stations could be made without disrupting any important communication service. In a few isolated cases use of certain frequencies by Japanese radio stations was prohibited due to interference to military or commercial circuits. Some frequencies have been cleared and their use by Japanese stations authorized in order to provide a particular service required by the Occupation Forces.
4. On 10 May 1946, a list of frequencies was allocated to the Japanese Government by the Office of the Chief Signal Officer, General Headquarters, United States Army Forces, Pacific. Approximately sixty percent of the frequencies allocated were those currently being used, the remainder being frequency upon which Japanese stations had not previously operated. This list was turned over to the Japanese Ministry of Communications for assignment of the frequencies to satisfy all their communications requirements.
5. The Ministry has made final assignments which are agreeable to the Civil Communications Section, General Headquarters, Supreme Commander for the Allied Powers. Due to the limited number of available frequencies it was necessary to assign frequencies for joint use by several stations and in same instances to discontinue services that were not considered essential.
6. Issuance of station licenses was directed to effect a more positive control over authorizing the operation of radio stations and to provide the Occupation Forces a means whereby they can readily determine if a station is authorized by the Ministry of Communications and registered with General Headquarters, Supreme Commander for the Allied Powers. The SCAP Registry Number appears in the "List of Frequencies Assigned" and will appear on each station license.
7. Surveillance by the Occupation Forces will be necessary to insure that only authorized radio stations are operated. Instructions pertaining to the manner of surveillance will follow through command channels.
R. G. HERSEY
Lt Col, AGD
Asst Adj Gen
DISTRIBUTION
Same as SCAPIN - 1166
Less Imperial Japanese Government
