Rome Mayor Virginia Raggi officiated the city’s first same-sex civil union on Saturday.

Luca de Sario and Francisco Raffaele Villarusso had moved to Spain and considered entering into the union there. However, they moved back to Italy after a law allowing for same-sex unions came into force three months ago.

Euronews reports:

While recognised as a step forward, the Civil Union bill has also come under fire for a controversial adoption clause.

Reports have also emerged in the Italian press of difficulties if the couple decides to combine their surnames, rather than choosing one family name. This is said to cause tax and identity problems that don’t exist for heterosexual couples.

Double-barrelling a name after a civil union is considered a ‘name-change’, meaning the couple’s tax code is changed. Further still, under Italian law, a ‘name-change’ is considered an ‘identity change’ meaning all identity documents and insurance will have to be changed and new social security cards applied for, La Repubblica reports.

In May, Italy became the last European Union country to legislate for same-sex civil unions after lawmakers passed a bill that would have forced Prime Minister Matteo Renzi to resign had the vote failed.

auguri Luca de Sario e Francisco !!!!!!! presto anche noi !!! <3 <3 https://t.co/xHenfsSNFM — 🏳️‍🌈 Matteo Laureti 🏳️‍🌈 (@matteolaureti) September 17, 2016

Watch a Euronews report on de Sario and Villarusso’s civil union below.