This paper proposes a more detailed classification of the legal part of the LADM, ISO 19152, (i.e. interests in land) than possible in the current standard (ISO, 2012) today and is an attempt to raise awareness of the possibilities to further develop the LADMs rightt, restrictionn and responsibilityy classes (RRR). The term landd is here used for land, water and air. The LADM does, in principle, already facilitate the modelling of e.g. informal and customary rights. However, there has, to the authorss knowledge, not yet been any approach that incorporates non-formal social tenure relationships, such as informal occupation, tenancy based on non-formal and informal rights and customary rights into the LADM. This paper uses the non-formal rights descriptions in the Social Tenure Domain Model (STDM) as an input to further develop the LADM.