The so-called Third Energy Package is a set of regulations the EU adopted in 2009 with the objective of liberalising its energy market, chiefly by separating the ownership of upstream, midstream and downstream operations, a process known as “unbundling” in Brussels.

According to these rules, SOCAR cannot buy, as it wished, a majority stake in DESFA, the Greek gas distributor.

That would effectively mean that the gas supplier would own the distributor as well.

SOCAR also owns a majority stake in TANAP, a pipeline running across Turkey. SOCAR is allowed to keep its 58% share in TANAP because it lies outside EU jurisdiction.

But when in 2013 it agreed a deal to buy 66% of the debt-ridden Greek company for €400m ($454m), the European Commission stepped in and froze the purchase. It said that SOCAR could own 49% of DESF but no more.

For a year now, SOCAR has tried to find buyers for part of the 66% stake it agreed to buy. If Fluxys flakes, Italian Snam Rete Gas and Dutch Gasunie could be next in line.

Even though SOCAR has become a good friend of the EU for its key role in the completion of the Southern Gas Corridor project, seen by Europe as a viable alternative to gas from Russia, it apparently cannot escape the severe hand of the EU’s army of regulators.

Azerbaijan’s SOCAR had initially agreed to buy a 66% stake in the Greek distributor in 2013 for €400m ($454m) but the European Commission stepped in and said that a 2009 regulation meant it could only buy a 49% stake. This effectively froze the deal until SOCAR found a company to agree to buy the 17% stake.

The pressure is now on SOCAR, which has until the end of 2016 to comply with EU regulations and find another purchaser.

In the current low-priced market, though, this will not be easy and SOCAR admitted as much.

“Currently we are in the process of reducing the stake of DESFA through sales to potential buyers in Europe and this process is expected to be completed in late 2016,” the Natural Gas Europe website quoted an unnamed source at SOCAR as saying.

For SOCAR, buying a stake in DESFA is important. It is due to play an important technical back-up role in Greece for the final section of a pipeline pumping gas to Europe from Azerbaijan.

The Greek newspaper Ekathi- merini quoted unnamed sources as saying that the deal with Fluxys was off. When reached by phone, though, Fluxys declined to confirm one way or the other.

A Fluxys spokesman said: “Since the beginning, we have not been involved directly as a company. It is a matter that Fluxys shareholders need to address.”

Neither Belgium’s Publigas, which owns 77.7% in Fluxys, nor Canada’s Caisse de depot et placement du Quebec, which owns 20% in Fluxys, could be reached for a comment.

Fluxys had looked like a good fit to buy DESFA because it owns a 19% stake in the Trans-Adriatic Pipeline (TAP), the planned final section of a network of pipelines stretching from the Caspian Sea to Europe.