In The Unicode Standard, Rejang script implementation is discussed in  Chapter 17 Indonesia and Oceania.

The Rejang script was encoded in The Unicode Standard version 5.1. The script is encoded in the following block:

BlocksCharacter RangeAdded in Unicode VersionUnicode Chart
Rejang A930..A95F 5.1  UA930.pdf

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

2006-01-11 Preliminary proposal for encoding the Rejang script in the BMP of the UCS — Michael Everson ( WG2 N3023,  L2/06-003)

2006-04-24 Proposal for encoding the Rejang script in the BMP of the UCS — Michael Everson ( WG2 N3096,  L2/06-139)

2011-03-03 Indonesian and Philippine Scripts and extensions not yet encoded or proposed for encoding in Unicode — Christopher Miller ( L2/11-091)