Subpart D-Identification of Radio Communication, and Allocation and Use of Call Signs

§2.301 Identification of transmissions.

For the purpose of identifications, with a view to the elimination of harmful interference and the general enforcement of applicable radio treaties, conventions, regulations, arrangements and agreements in force, and the enforcement of the Communications Act of 1934, as amended, and the Commission's rules, each station using radio frequencies shall identify its transmissions as prescribed by the rules governing the class of station to which it belongs.

§ 2.302 Table of allocation of call signs. The table which follows indicates the composition and blocks of international call signs available for assignment when such call signs are required to be transmitted for station identification by the rules pertaining to particular classes of stations. Assignments will be made in each block beginning with the lowest alphabetic and numerical combination available in each call sign district and increasing until requirements are met. When stations operating in two or more classes are authorized to the same licensee, for the same location, the Commission will assign a separate call sign to each station in a different class, according to the following table:

$2.403 Retransmission of distress mes

sage.

Any station which becomes aware that a mobile station is in distress may transmit the distress message in the following cases:

(a) When the station in distress is not itself in a position to transmit the message.

(b) In the case of mobile stations, when the master or the person in charge of the ship, aircraft, or other vehicles carrying the station which intervenes believes that further help is necessary.

(c) In the case of other stations, when directed to do so by the station in control of distress traffic or when it has reason to believe that a distress call which it has intercepted has not been received by any station in a position to render aid. $2.404 Resumption of operation after distress.

are

No station having been notified to cease operation shall resume operation on frequency or frequencies which may cause interference until notified by the station issuing the original notice that the station involved will not interfere with distress traffic as it is then being routed or until the receipt of a general notice that the need for handling distress traffic no longer exists. $2.405 Operation during emergency. The licensee of any station (except amateur, standard broadcast, FM broadcast, noncommercial educational FM broadcast, or television broadcast) may, during a period of emergency in which normal communication facilities disrupted as a result of hurricane, flood, earthquake, or similar disaster, utilize such station for emergency communication service in communicating in a manner other than that specified in the instrument of authorization: Provided: (a) That as soon as possible after the beginning of such emergency use, notice be sent to the Commission at Washington, D.C., and to the Engineer in Charge of the district in which the station is located, stating the nature of the emergency and the use to which the station is being put, and (b) That the emergency use of the station shall be discontinued as soon as substantially normal communication facilities are again available, and (c) That the Commission at Wash

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ington, D.C., and the Engineer in Charge shall be notified immediately when such special use of the station is terminated: Provided further, (d) That in no event shall any station engage in emergency transmission on frequencies other than, or with power in excess of, that specified in the instrument of authorization or as otherwise expressly provided by the Commission, or by law: And provided further, (e) That any such emergency communication undertaken under this section shall terminate upon order of the Commission.

NOTE: Part 3 of this chapter contains provisions governing emergency operation of standard, FM, noncommercial educational FM, and television broadcast stations. Part 12 of this chapter contains such provisions for amateur stations.

[28 FR. 13785, Dec. 18, 1963]

§ 2.406 National defense; free service.

Any common carrier subject to the Communications Act may render to any agency of the United States Government free service in connection with the preparation for the national defense. Every such carrier rendering any such free service shall make and file, in duplicate, with the Commission, on or before the 31st day of July and on or before the 31st day of January in each year, reports covering the periods of 6 months ending on the 30th day of June and the 31st day of December, respectively, next prior to said dates. These reports shall show the names of the agencies to which free service was rendered pursuant to this rule, the general character of the communications handled for each agency, and the charges in dollars which would have accrued to the carrier for such service rendered to each agency if charges for all such communications had been collected at the published tariff rates. § 2.407 National defense; emergency authorization.

The Federal Communications Commission may authorize the licensee of any radio station during a period of national emergency to operate its facilities upon such frequencies, with such power and points of communication, and in such a manner beyond that specified in the station license as may be requested by the Army, Navy, or Air Force.

and Type Acceptance

GENERAL

§ 2.551 Program defined.

In order to carry out its responsibilities under the Communications Act and the various treaties and international regulations, it is necessary for the Commission to ascertain that the equipment involved is capable of meeting the technical operating standards set forth in said statutes, treaties and the Commission's rules and regulations. To facilitate such determinations in those services where equipment is generally standardized, to promote the improvement of equipment and to promote the efficient use of the radio spectrum, the Commission has designed two specific procedures for securing advance approval of equipment. These procedures are designated as type approval and type acceptance. Ordinarily, type approval contemplates tests conducted by Commission personnel, while type acceptance is based on data concerning the equipment submitted by the manufacturer or the individual prospective licensee. The procedures described in this subpart are intended to apply to equipment in those services which specifically require either type approval or type acceptance. These procedures may also be applied to equipment components, such as radio frequency power amplifiers, etc., to the extent specified in the rules of the particular service in which such components will be used. § 2.553 Radio equipment list.

A list of type approved and type accepted equipment is published periodically by the Commission. Public notice of type acceptance and type approval will be by publication in the equipment list, a copy of which will be furnished each manufacturer of listed equipment. Equipment which was listed prior to May 16, 1955, will be continued on the list unless it is removed by Commission action in accordance with the provisions of § 2.575. Copies of the Radio Equipment List are available for inspection at the Commission offices in Washington, D.C., and at each of its field offices. The Radio Equipment List is published in three parts:

Part A, Television Broadcast Equipment
Part B, Aural Broadcast Equipment
Part C, Other than Broadcast Equipment

or type accepted equipment for testing or inspection.

Upon request by the Commission any manufacturer of equipment which has been type approved or type accepted by the Commission shall cooperate in making available to the Commission models of said type approved or type accepted equipment in order that the equipment may be tested or inspected either at the place of manufacture or at the Commission's laboratory at Laurel, Maryland,

§ 2.557

Limitation on availability of equipment files for public reference. (a) Files containing information about equipment submitted by manufacturers and other persons pursuant to the rules in this part will not be open to the public.

(b) The Commission will cooperate with a manufacturer's desire to withhold the addition of new equipment to the radio equipment list until a date no earlier than that specified by the manufacturer.

TYPE APPROVAL

§ 2.561 Type approval.

(a) Type approval is normally based on tests performed at the Commission's laboratory at Laurel, Maryland. In certain cases, type approval may be based on tests performed at other locations provided the tests are conducted in accordance with procedures specified by the Commission and by or under the direction and supervision of Commission personnel.

(b) Application for type approval may be in the form of a letter addressed to the Secretary of the Commission. The letter shall specify the part of the rules under which type approval is desired and shall include any information specifically required to be submitted under such part of the rules. In addition the request shall describe the equipment to be tested and include the size and weight of each component. In most cases, the Commission will advise the applicant to ship the equipment prepaid to Chief. Laboratory Division, P. O. Box 31, Laurel, Md., 20810, complete with operating instructions and circuit diagrams. Upon completion of the tests, the equipment will be returned to the applicant, shipping charges collect.

(c) In the event of failure of the equipment to meet the Commission's