Heritage preservation in North Korea has been administered by different laws and governing bodies over time.
In 1994, the "Cultural heritage protection act" was legislated in 1994.
The legislation only considers artefacts of material culture and was classified into three categories,National treasure level artefacts,Quasi-national treasure level(then also called conservation grade relics) and general artefacts.
[1] In 2012, "the cultural heritage law" was legislated, which compared to the law in 1994, included non material culture heritage(some media translate as non-material cultural properties[2]) designations(equivalent to intangible cultural assets), that are designated at a state or local level, and artefacts and historic relics having its own separate numbering system,designations and classification systems(the 1994 did not differentiate between the two and put under the single name artefact, with three classifications but the new law classifies artefacts into two as national and general, and in terms of historic relics classifies into three as national,quasi national, and general.
[3] The lists presented in these following links are based on data from 2005,when the 1994 law was still in effect.