The Rules for Unified English Braille (UEB), 2024 and Guidelines for Technical Materials, 2014 are available at the ICEB Website.
Additional BANA publications as well as updates to the publications below are available on the BANA website at Codebooks and Guidelines
Additional materials from BANA are available at the BANA UEB Page
The following BANA publications are available for purchase from the sources indicated.
American Printing House for the Blind (APH)
The Rules of Unified English Braille; Braille, Third Edition
https://www.aph.org/product/rules-of-unified-english-braille-braille-third-edition/
The Rules of Unified English Braille; Print, Third Edition
https://www.aph.org/product/rules-of-unified-english-braille-print-third-edition/
The Nemeth Braille Code for Mathematics and Science Notation 2022; Braille Edition
https://www.aph.org/product/nemeth-braille-code-for-mathematics-2022-braille/
The Nemeth Braille Code for Mathematics and Science Notation 2022; Print Edition
https://www.aph.org/product/the-nemeth-braille-code-for-mathematics-and-science-notation-2022-print/
Music Braille Code, 2015, Braille
https://www.aph.org/product/music-braille-code-2015-braille/
Music Braille Code, 2015, Print
https://www.aph.org/product/music-braille-code-2015-print/
Braille Formats: Principles of Print-to-Braille Transcription, 2016 – Braille
Braille Formats: Principles of Print-to-Braille Transcription, 2016 – Print
https://www.aph.org/product/braille-formats-principles-of-print-to-braille-transcription-2016-print/
Chemical Notation Using the Nemeth Braille Code 2023
https://www.aph.org/product/bana-code-for-chemical-notation/
For the Chemistry Code, make sure to look under "Optional And Replacement Items"