I believe the general public is entitled to participate in discussions regarding changes to classification standards. AACR2 is currently under major revision. The official FAQ answers some questions here:
http://www.collectionscanada.ca/jsc/rdafaq.html#2-1

Two more questions that aren’t answered by the comment:

What happens to a librarian when she/he violates the norms of the discipline? Is there some mechanism for imposing sanctions or another remedy on the individual? Or on the institution (i.e., on the library that misbehaves, or employs the librarian that misbehaves)?

Is the general public entitled to participate in discussions regarding changes to classification standards?

In the US, the MLIS and related library degrees are given by schools accredited by the Amercian Library Association. The accreditation policies, procedures, and reports are available here:
http://www.ala.org/ala/accreditation/accredstandards/index.htm

Schools go up for reaccreditation on a periodic basis- six or seven years, I forget off the top of my head.

There is a large community of different but related professional assocations beyond that, for libraries, archives, and other information-related professions. Such organizations include the Society for American Archivists, the Special Libraries Association, state Library Associations, and other groups.

Not all librarians are public librarians, and not everyone who is called a librarian has the accredited degree (although most do).

The workings of public or academic library is more transparent than a private corporation in a number of ways. The classification standards used are accessible by anyone, including MARC and AACR2 cataloging standards. The development of these standards is an open process. There are also international norms associated with the sharing of information, and policies developed by the Library of Congress. If someone wants to look, although there are certain investments in time and effort, they are able to.

University library records are also subject to laws such as open records acts, which is how we initially saw Google’s contract with the University of Michigan.

I view the transparency of public libraries in this discussion similar to open source software and how it differs from proprietary software, although the analogy is not completely accurate.

Who enforces the librarians’ code and norms, and how frequently are enforcement mechanisms invoked? That sounds like self-policing to me — which can be a suspicious thing.

Faculty have an important university governance role — in theory; in practice they’re usually pretty indifferent. When was the last time a university librarian was called on the Faculty Senate carpet? And who are faculty accountable to?

Public employees are rarely really accountable to anyone, except in a crisis or a scandal.

Again, I’m not dismissing librarians; they’ve done heroic work. But the “Google isn’t accountable, librarians are” argument isn’t impressing me.

Second, academic librarians answer to the faculty of their respective universities.

Third, public academic librarians must serve the taxpayers of the states that employ them. They have the same ties of accountability that any other public employee has.

My point is that it is stupid and counterproductive for the very people who do things best (the publicly-minded and accountable professionals) willingly sign over control to an unaccountable private entity.