All cars are automatically built to the base country specific spec current at the build week. They do not build Model year 15 cars after BW 22 to cater for orders made prior, year 16 is year 16 and thats that!. Most of the time this just happens and many folk just dont realise the often subtle differences to the post BW 22 (or spec changes BW45) cars they take delivery of.
I guess I need to illustrate my point re factory spec changes (with real examples from last few years) - the classic case is someone who ordered a Golf SE before the 'Match' model (with extra spec) was announced. The factory then starts building Match spec cars and deletes the SE spec - result - you automatically get the additional items in 'Match' without asking - they DO NOT continue to build SE cars to fulfill earlier orders - hence the caveat in the brochures 'VW reserve the right the change specifications without notice etc etc'.
Another example - if you ordered a Scircoco GT in late 2012 (before the free leather interior was announced). During your build wait they changed the base spec to include leather - thats what you got without asking for it. Nobody was given a cloth interior because they did not order the free leather!
But it can work the other way too - on the Golf Mk.V at one point they took out some spec items from the SE and made them optional. Dealers mainly ignored this and when people got delivery of their cars, I think it was the convenience pack (from memory) was missing, so no auto dimming rear view mirror, auto lights, wipers etc . What happened is that during the time between ordering and build that pack had been consigned to the options list - but you had to have know that and changed your order to include it as an option in order to still get it.