BPS Code of Good Practice for Psychological Testing
British Psychological Society, 2007 

URL: http://www.psychtesting.org.uk/download$.cfm?file_uuid=663F4988-A7A7-91D6-68E7-677BD82D14E9&siteName=ptc

[from the web]
Using Tests: All qualified testers holding one of the Society's qualifications in test use, with a current entry on the Register of Qualifications in Test Use (RQTU), are required to adhere to the principles outlined in the Code of Good Practice for Psychological Testing. (This has recently been updated.)