[_delirium]

Yeah, there's a giant table here: https://en.wikipedia.org/wiki/Freedom_of_movement_for_worker...

After a country joins the EU, its citizens gain full freedom of movement after 7 years maximum. Countries can impose a 2-year transitional period, followed by a 3-year extension, and another 2-year extension, with escalating requirements for what claims need to be made to justify an extension.

For example here in Denmark there was only a 2-year transitional period, so Romanians and Bulgarians are free to work here without a permit since 1/1/2009. But a few EU countries, such as Germany and the UK, exercised an extraordinary right to delay implementation for a full 7 years, by asserting "serious labor-market disruption". Italy was in between, applying the 2+3 but not the full 2+3+2 transitional period, so Romanians/Bulgarians may work there without a permit since 1/1/2012. Since 1/1/2014 all transitional periods for Romania and Bulgaria have expired (a transitional period for Croatia is still in effect in some countries).

However I was imprecise on the terminology: Romania and Bulgaria are actually not in Schengen yet, so EU states may impose border checks. What they are part of is the free-movement-of-labor zone, which is not quite identical to Schengen.