In The Unicode Standard, Tai Le script implementation is discussed in  Chapter 16 Southeast Asia.

The Tai Le script was encoded in The Unicode Standard version 4.0. The script is encoded in the following block:

BlocksCharacter RangeAdded in Unicode VersionUnicode Chart
Tai Le 1950..197F 4.0  U1950.pdf

A number of proposals for its inclusion have been submitted to the Unicode Technical Committee and WG2:

1992-11-25 Tai Mau, Tai Nua — Rick McGowan ( Unicode Technical Report #3 R2)

2000-08-08 Proposal for encoding Dehong Dai script on BMP of ISO/IEC 10646 — China N.B. ( WG2 N2239r,  L2/00-281, L2/00-361)

2000-09-25 Report on Tai Le (Dehong Dai) script — Ad-hoc on Tai Le (Dehong Dai) ( WG2 N2292,  L2/00-347)

2001-09-14 Proposal Summary Form for Dai scripts — China N.B. ( WG2 N2371,  L2/01-348)

2001-10-06 Revised proposal for encoding the Tai Le script in the BMP of the UCS — Michael Everson ( WG2 N2372,  L2/01-369)

2003-08-13 Introduction to the Tai Le Script — Daniel Kai ( L2/03-258)

2003-08-13 Lepcha, Limbu, Syloti, Saurashtra, Tai Le and Bugis Proposals — Daniel Kai ( L2/03-253)

2004-03-09 Indic scripts collation grouping; CTT suggestion — Kent Karlsson ( WG2 2716.doc,  L2/04-109)