Conversation so far:
when did turkey become a candidate for the eu
Turkey signed a Customs Union agreement with the EU in 1995 and was officially recognised as a candidate for full membership on 12 December 1999.
what happened after the 1995 turkey eu customs union agreement
In 1996 a free trade area was established between Turkey and the European Union for products covered by the European Coal and Steel Community.
what is the main point of the 1995 turkey eu custom union
Turkey signed a Customs Union agreement with the EU so goods may travel between the two entities without any customs restrictions.
what were the results of the 1995 turkey eu custom union
The customs union increased both imports and exports in Turkey, as well as its GDP per capita. Also Turkey's membership led to its economy's transition from agrarian to industrial.

Question: what does the union require
Self-contained rewrite: what does the 1995 turkey eu custom union require