Until the time of investment approval, bitcoin may be considered illegal in the country and it has been probably prohibited by the government of the country. The approval is therefore to let people know that they can deal freely in bitcoin and it may come with some guidelines, rules and regulations.
I think the approval to other country means its validity and regularization, for Bitcoin to be legalize, it should be studied by the country who will accept it as one of their currency, some countries are adapting bitcoin and accepting it as payments there are also some that prohibited it.