In The Unicode Standard, Ahom script implementation is discussed in  Chapter 15 South and Central Asia-IV: Other Historic Scripts.

The Ahom script was encoded in The Unicode Standard version 8.0. The script is encoded in the following block:

BlocksCharacter RangeAdded in Unicode VersionUnicode Chart
Ahom 11700..1173F 8.0  U11700

Subsequent to version 8.0, the following characters have been added to the Ahom script:

CharactersUnicode VersionDocumentation
1171A pending WG2 N4321R,  L2/15-272

Documentation refers to  ISO Working Group and Unicode proposals

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

1992-10-29 Ahom / Khamti — Rick McGowan ( Unicode Technical Report #3 R2)

2010-09-17 Preliminary Proposal to add the Ahom Script in the SMP of the UCS — Martin Hosken, Stephen Morey ( WG2 N3928,  L2/10-359)

2012-07-02 Proposal to add the Ahom Script in the SMP of the UCS — Martin Hosken, Stephen Morey ( WG2 N4290,  L2/12-222)

2012-10-23 Revised Proposal to add the Ahom Script in the SMP of the UCS — Martin Hosken, Stephen Morey (  WG2 N4321,  L2/12-309)

2015-10-26 Proposal to add one extra character to the Ahom Block of the UCS — Martin Hosken, Stephen Morey (WG2 N4321R,  L2/15-272)

UTC #145 Minutes ( L2/15-254) (See D.13 for decision and action items)