each year, the world heritage committee may inscribe new sites on the list, or delist sites that no longer meet the criteria. selection is based on ten criteria: six for cultural heritage (i–vi) and four for natural heritage (vii–x). some sites, designated mixed sites, represent both cultural and natural heritage. in oceania there are 11 cultural, 19 natural and 7 mixed sites. unesco may also specify that a site is in danger, stating "conditions which threaten the very characteristics for which a property was inscribed on the world heritage list." in 2013, the committee added east rennell to the list of world heritage in danger because of the threat of logging activities to the site's outstanding universal value.