Polish President Karol Nawrocki has vetoed a bill introducing ‘cohabitation contracts’ for couples living together regardless of their gender, arguing that the legislation goes against the constitutional definition of marriage as the union of a man and a woman.

The veto is another blow to pro-EU Prime Minister Donald Tusk, who has repeatedly pledged to deliver reforms on LGBTQ rights and less strict abortion laws. A lack of unity on the sensitive issues within the ruling coalition, as well as resistance from the nationalist president, has hampered the advancement of these plans.

The legislation envisioned the introduction of cohabitation contracts, which would have allowed two adults to enter into a marriage-like agreement governing various issues, including access to medical information, joint property rights, and burial matters. The final version of the bill was already watered down to secure support from conservative partners within the ruling coalition, which argued that the original legislation would have undermined marriage.

Nawrocki argued that the bill “would lead to the loss of the ‌special status of marriage, defined in... the Constitution as the union of a man and a woman.”

“These proposals create a new, formalized institution of family law, equipped with a broad catalog of rights similar to those of marriage,” he said on Friday.

Tusk condemned the veto, calling Nawrocki’s decision “an expression of contempt for people and their right to happiness and a normal life.”

The government now needs to secure a three-fifths majority in parliament to overturn the presidential veto. This is highly unlikely, as the legislation is strongly opposed by right-wing opposition parties and the ruling coalition lacks the necessary numbers by a wide margin.

This comes after the EU’s highest court forced Poland to recognize same-sex marriages registered in other countries of the bloc. The ruling was handed down last November, with Poland’s Supreme Administrative Court citing it for the first time in March when it ordered the authorities to recognize the marriage of two Polish men registered in Germany and the first same-sex marriage certificate was issued in the country in May.