Preferential trade with the EU, a major trading partner for Ukraine, expires on June 5. Serhiy Nikolaichuk, deputy central bank governor, said Ukraine and the European Union would return to a regime that was agreed as part of the free trade agreement. It envisages about 30 quotas for Ukrainian products, he said. The central bank intervenes regularly on the foreign exchange market to meet demand for hard currency and smooth out fluctuations in the currency exchange rate. The current account deficit was $6.8 billion in January to April, compared with $5.3 billion in the same period a year ago, central bank data showed.