A (same-sex) couple not married is eligible for
the "household allowance" if they do not have
access to civil marriage in an EU Member State.
Mr. W. is a dual Belgian-Moroccan national. He
and his Spanish male partner chose a
"declaration of statutory cohabition" under
Belgian law, rather than a civil marriage,
because sexual activity between men is a
criminal offence in Morocco. After the
declaration, his civil status remained single. A
civil marriage would have required him to report
his marriage (a change of civil status) to
Moroccan consular officials in Belgium.
The Tribunal concluded that, on the facts of the
case, the applicant did not have "concrete and
effective" access to civil marriage in Belgium.
This meant that he was exempted from the
marriage requirement and could rely on the
declaration.
http://curia.europa.eu