Sec. 97.309  RTTY and data emission codes.

    (a) Where authorized by Secs. 97.305(c) and 97.307(f) of the part, 
an amateur station may transmit a RTTY or data emission using the 
following specified digital codes:
    (1) The 5-unit, start-stop, International Telegraph Alphabet No. 2, 
code defined in International Telegraph and Telephone Consultative 
Committee Recommendation F.1, Division C (commonly known as Baudot).
    (2) The 7-unit code specified in International Radio Consultative 
Committee Recommendation CCIR 476-2 (1978), 476-3 (1982), 476-4 (1986) 
or 625 (1986) (commonly known as AMTOR).
    (3) The 7-unit code defined in American National Standards Institute 
X3.4-1977 or International Alphabet No. 5 defined in International 
Telegraph and Telephone Consultative Committee Recommendation T.50 or in 
International Organization for Standardization, International Standard 
ISO 646 (1983), and extensions as provided for in CCITT Recommendation 
T.61 (Malaga-Torremolinos, 1984) (commonly known as ASCII).
    (4) An amateur station transmitting a RTTY or data emission using a 
digital code specified in this paragraph may use any technique whose 
technical characteristics have been documented publicly, such as CLOVER, 
G-TOR, or PacTOR, for the purpose of facilitating communications.
    (b) Where authorized by Secs. 97.305(c) and 97.307(f) of this part, 
a station may transmit a RTTY or data emission using an unspecified 
digital code, except to a station in a country with which the United 
States does not have an agreement permitting the code to be used. RTTY 
and data emissions using unspecified digital codes must not be 
transmitted for the purpose of obscuring the meaning of any 
communication. When deemed necessary by an EIC to assure compliance with 
the FCC Rules, a station must:
    (1) Cease the transmission using the unspecified digital code;
    (2) Restrict transmissions of any digital code to the extent 
instructed;
    (3) Maintain a record, convertible to the original information, of 
all digital communications transmitted.
[ 54 FR 25857 , June 20, 1989, as amended at  54 FR 39537 , Sept. 27, 1989; 
 56 FR 56172 , Nov. 1, 1991;  60 FR 55486 , Nov. 1, 1995]

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