The Government signed up on Monday to the new UN Convention on the
rights of persons with disabilities

The big change which is directly relevant to people who use AAC is
Article 21 - Freedom of expression and opinion, and access to
information

States Parties shall take all appropriate measures to ensure that
persons with disabilities can exercise the right to freedom of
expression and opinion, including the freedom to seek, receive and
impart information and ideas on an equal basis with others and
through all forms of communication of their choice, as defined in
article 2 of the present Convention, including by:

a. Providing information intended for the general public to
persons with disabilities in accessible formats and technologies
appropriate to different kinds of disabilities in a timely manner and
without additional cost;

b. Accepting and facilitating the use of sign languages,
Braille, augmentative and alternative communication, and all other
accessible means, modes and formats of communication of their choice
by persons with disabilities in official interactions;

c. Urging private entities that provide services to the general
public, including through the Internet, to provide information and
services in accessible and usable formats for persons with
disabilities;

d. Encouraging the mass media, including providers of
information through the Internet, to make their services accessible
to persons with disabilities;

e. Recognizing and promoting the use of sign languages.

Here's the web reference for those wanting further information:

http://www.edcm.org.uk/Page.asp?
originx_3626jy_1149332043248p37o_20073303211g