The src subfolder contains Tame the BeaST version 1.4, taken from https://www.ctan.org/tex-archive/info/bibtex/tamethebeast on 7 June 2022.
The license text from https://www.latex-project.org/lppl/lppl-1-3.txt archived on 7 June 2022 is available as lppl-1-3.txt. A Web version is available at https://www.latex-project.org/lppl/lppl-1-3/.