Every trust should have its own list of recognised abbreviations. If it's not on the list - don't use it!

There are too many to list and the AAMT (whatever they call themselves now) keeps changing the list all the time. Usually your employer will furnish you a list of abbreviations approved by their clients. Stedmans also publishes a book of medical abbreviations.

The abbreviation cc is now mL. Any abbreviation that is not clear what it is.

Eliminating medical abbreviations would reduce errors because many abbreviations are very similar and therefore people get confused between them, however, if abbreviations were eliminated it would make it very difficult on medical professionals who would have to write out very lengthy medical terms. That's why many organizations are developing written policies stating which abbreviations should not be used and medical professionals are trained to write legible when using other abbreviations

Yes, the most common list is JCAHO's. It can be found at the "related link" for this question.

how can eliminating medical abbreviations reduce errors