This definition appears very rarely
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The code is adopted as the character set for Library of Congress with the name East Asia Coded Character (EACC, ANSI/NISO Z39. 64).
This document contains links to 15,738 mappings for characters from the East Asian Coded Character set (ANSI/NISO Z39. 64, or "EACC") to characters in the Universal Coded Character Set (UCS)/Unicode. Because of the large number of East Asian ideographic characters, specific character names are not provided for all characters. The table is based on a December 2001 consolidation done by the Library of Congress of 13 separate groups of mappings for characters in EACC to UCS/Unicode.
CCCII is a superset of ASCII designed to conform to ISO 2022. Each Chinese character is represented by a 3-byte code in which each byte is 7-bit. Thus, the maximum number of Chinese characters representable in CCCII is 94×94×94 = 830584. In practice the number of characters encodable by CCCII would be less than this number, because variant characters are encoded in related ISO 2022 planes under CCCII, so most of the code points would have to be reserved for variants. The code is adopted as the character set for Library of Congress with the name East Asia Coded Character.