For example, in Van Binsbergen v Bestuur van de Bedrijfvereniging voor de Metaalnijverheid a Dutch lawyer moved to Belgium while advising a client in a social security case, and was told he could not continue because Dutch law said only people established in the Netherlands could give legal advice.
Why was the Dutch lawyer who moved to Belgium while advising a client in a social society case told he couldn't continue?
because Dutch law said only people established in the Netherlands could give legal advice