The following Unicode-related documents record the purpose and process of defining specific characters in the Unified Canadian Aboriginal Syllabics block:
Moore, Lisa (2018-10-29), "Consensus 157-C16", UTC #157 Minutes, Change the general category of U+166D CANADIAN SYLLABICS CHI SIGN from "Po" to "So" and make it Terminal_Punctuation=No.
Anderson, Deborah; Whistler, Ken; Pournader, Roozbeh; Moore, Lisa; Liang, Hai (2021-04-23), "2. Unified Canadian Aboriginal Syllabics", Recommendations to UTC #167 April 2021 on Script Proposals
King, Kevin (2021-07-07), Proposed changes to the representative glyphs of the Unified Canadian Aboriginal Syllabics code charts [Affects U+144B, 14D1, 1506, 15C0-15C3, 15E8-15EE, 1601, 1604-1607, 160A-160D, 1614-162D, 1630-163F, 1646-1647, 165A]
Anderson, Deborah; Whistler, Ken; Pournader, Roozbeh; Liang, Hai (2021-07-26), "4. Unified Canadian Aboriginal Syllabics", Recommendations to UTC #168 July 2021 on Script Proposals
Cummings, Craig (2021-08-03), "Consensus 168-C21", Draft Minutes of UTC Meeting 168, Accept 186 changes for glyphs in the Unified Canadian Aboriginal Syllabics and Unified Canadian Aboriginal Syllabics Extended blocks
Aliprand, Joan; Winkler, Arnold (1998-02-24), "3.A.1. NEW PROPOSALS a. Additional Canadian Syllabics", Preliminary Minutes - UTC #74 & L2 #171, Mountain View, CA - December 5, 1997