Such solution is fixed by the NBU in resolution № 49 "About measures for banks and currency operations ", dated  06.02.2014 (Resolution  49 ), which is temporary!

So resolution 49 provides such rules:

  - Establishing a zero rate of reserve funds on short-term external  debt (not more than 183 days);

 - Restrictions for legal entities and natural persons-entrepreneurs to make payments within certain bank day in amount which is on the account at the BEGINNING of the day, so they MAY pay for goods/service only using amount from account which was on such account at the beginning of the trading day;

 -  Restrictions for residents to buy foreign currency for special transactions - investment abroad, early payments according credit agreements ;

 - Restrictions legal entities and  natural persons-entrepreneurs on the terms of buying of  foreign exchange, namely the currency is bought at the earliest on the 6th day day after the transfer of funds to the bank;

- Restrictions  for individuals ( both - residents and non-residents ) for the transfer of funds abroad in foreign currency   - allowed NOT MORE than equivalent  in 50 000 UAH per month (exception in particular, needs for treatment abroad , execution of court decisions ets )

Resolution enters into force February 7th, 2014 and is valid until the next resolution of the National Bank of Ukraine o.

Read the full text of the decision here:

http://www.bank.gov.ua/doccatalog/document?id=5454032