A Hungarian children's book promoting minority rights drew criticism last year. Now Hungary's ruling nationalist party has submitted legislation to ban content which it sees as promoting homosexuality and gender change to minors. The draft law would ban LGBT literature for under-18s, including educational material, and advertisements deemed to be promoting gay rights. Several human rights groups denounced it, saying it was similar to Russian restrictions on LGBT activities. Hungary's constitution states that marriage is for heterosexual couples and proposes a same-sex adoption ban.