What defines a Golf Shoe?

If my club pro told me that a pair of Ecco golf shoes, as in the picture in the OP, were not golf shoes my reaction would be:

go onto the internet, go onto the Ecco website, type in "golf shoes" and show him a picture of that golf shoe.

I would therefore expect to be allowed to wear them on the course, because our club rules state that we must wear "golf shoes".

IF I was wearing a pair of trainers with similar tread they wouldn't be under "golf shoes" and therefore would not be golf shoes.