As of early 2022, ACES documentation (ACES specifications, technical bulletins, procedures, and guides) has been migrated to an online documentation system, available at docs.acescentral.com.
The docs at the above link should be considered the most up-to-date. Prior to this online documentation system, PDFs were rendered from LaTeX source. For now, the LaTeX source will remain available in this repository but will eventually be removed once full migration to the mkdocs system is complete.