From Bureau Veritas:

The Official Journal of the EU has published a harmonised version of the test methods to determine the amount of Nickel migration from metal parts in direct and prolonged contact with the human skin. The standards EN 1811:2011, EN 12472:2005 and EN 16128:2011 will become the official reference methods to determine the compliance of products with entry 27 of the REACH regulation. The prior versions of the standards will still be applicable until 31 March 2013.

The standards can be found at the above link.