Straipsnyje iš ontologinės perspektyvos analizuojama, ar įstatymų leidėjas gali sutapatinti sugyventinių institutą su santuokos institutu.

After examining how gender identity is being understood and how transsexualism is being defined, the article focuses on the problems faced by the Canon Law, when the Canon Law is supposed to address issues of gender identity (transsexualism). The authors analyse the legitimacy of marriage in the case of transsexualism, discuss the issues arising in the consecrated life and the sacrament of baptism while answering the question whether a transsexual person is capable of becoming a godparent.