Unofficial information suggests European Commission President Jean-Claude Juncker would invite the Slovenian and Croatian prime ministers to a meeting in the coming weeks.

Juncker is said to plan to take on a more active role, yet Ljubljana and Zagreb are still expected to find a solution themselves.

Although publicly expressing its willingness to help, the Commission has not yet assumed a pro-active role to have the arbitration decision implemented.

Even if Juncker gets involved, he is expected to do it out of the public eye.

Unofficial sources have indicated Brussels was unhappy when Slovenia publicly spoke about the Commission's planned involvement at the end of last year, having expected talks would be secret.

Elmar Brok (EPP/CDU), a member of the European Parliament's Foreign Policy Committee, advocates "a practical solution which is in the interest of both sides".

Speaking to Slovenian reporters on the sidelines of the recent plenary in Strasbourg, he said emotions should be put aside and the two EU members should find a solution through dialogue. Talks do not mean the arbitration decision has fallen through, he said.

Meanwhile, Slovenian MEP Tanja Fajon (S&D/SD) expects the Commission to play an important role, but believes "a solution will have to come from our side, and then the European Commission will help".

She believes the Commission's First Vice-President Frans Timmermans, who comes from the same political group as her, has regular contacts with both sides.

It is also possible that at some point the European Parliament will discuss a document on the issue of Croatia and the respect of European law, said Fajon.

"Such calls have already reached Timmermans, who is aware the disrespect of the arbitration agreement could severely threaten EU enlargement to the Western Balkans."

MEP Lojze Petrele (EPP/NSi) noted that "we can't bypass the arbitral tribunal's decision, and that the EU would be in big trouble if it went along any other way."

"I've not come across a single person in European institutions who would not agree with the Commission, which has supported the implementation of the arbitration decision eleven times," he stressed.

Meanwhile, Croatian MEP Ivan Jakovčić (ALDE/IDS) stressed that "the arbitration decision is a good basis to reach a bilateral agreement".

Ne noted, though, that nobody in the Croatian parliament would raise their hand for the arbitration decision, but stressed the interests of Croatian fishermen should be protected.

Noting that things were going in the wrong direction, Slovenian MEP Ivo Vajgl (ALDE/DeSus) said the issue should not turn into "a nationalist conflict".

He favours talks and dialogue with a view to put "the problematic issue in a European context". He said Croatia had a strategic interest to be part of a progressive Europe.

Seeing no big difference between Slovenia and Croatia in perceiving the arbitration decision, Franc Bogovič (EPP/SLS) believes that given Croatia's withdrawal from the arbitration process in 2015, the biggest problem is how to formally bring this business to an end.

He believes it is now time for both countries's diplomatic services to do their job.

Romana Tomc (EPP/SDS) does not see the Commission, which she doubts would side with either country at any point, having any means of influencing either Slovenia or Croatia.

She urged quit diplomacy, and noted that while there was a lot of talk about implementation, Slovenia had not got what it expected to in terms of its junction with the high seas.

According to Igor Šoltes (Greens), it would be a bit naive to rely only on the Commission to have the decision implemented.

However, he noted that the arbitration decision was part of international law, which was what the EU was built on.