NATO exercise Steadfast Javelin II showed that the safety of member states will not be compromised, experts said.
Participants in foreign conflicts can receive jail sentences of at least five years.
The proposed law, which would be supported by a loan from the World Bank, is being considered by Parliament. In other business news: optimism grows for the economy's future in southeast Europe.
Efforts by the authorities as well as the end of duty tariffs on car imports have had an impact.
A new agreement with Romania will boost the visa liberalisation process, moving Ukraine toward EU membership.