Apparently submitted by NAMA to the DoF on 12th March, 2010 the Codes were amended and agreed by the DoF on 5th July 2010 and published by NAMA on 6th July, 2010 and are available here:
The commercial interests of non-participating institutions
Servicing standards for acquired bank assets
Risk management including with regard to debtors
These are fairly lengthy documents and will be analysed on here in due course.