The OSEP Letter which was written June 19th of 2013 is now available for download in Word and PDF. The webpage is: http://www2.ed.gov/policy/speced/guid/idea/letters/2013-2/index.html.
This letter reiterated the strength of teaching braille and the reminder that braille is the first choice for literacy instruction for students determined to be eligible as visually impaired. Braille is so important, evaluations must be completed to rule out the instruction of braille, not the other way around.
The reasoning behind writing it might not be known as we do not know the addressee. What we do know is that it was important enough for OSEP to answer. Our students deserve instruction in braille. Our students with low vision deserve to be considered for braille first, print second. Our students require competent trained teachers of the visually impaired, ones who are knowledgeable in braille.