lol, its called an IT acquisition policy and every serious organization has one. MA is merely saying that part of their software standards include support for ODF and that any vendor (open or closed) needs to support that standard. Nothing is banned, prohibited, or restricted save the final format of a document. If the software acquisition policy stated doc/xls/ppt (as the policy at my office does) the ramifications would be the same, any software that supported that software could be considered.
By mandating an open document format that no individual can limit MA has not limited the types of technology they have, in fact, expanded them. By sticking with a proprietary format you are *BY DEFINITION* limiting what technology can be used, by picking an open one you are giving every software vendor in the world a shot at filling your needs, and that includes Microsoft!
Insane. They chose an untested mod of a minority product, one that basically none of their current constituents have have access to.