Communication sent by Special Rapporteur Indigenous Peoples concerning recent developments regarding the nomination and declaration of World Heritage sites by the World Heritage Committee. In this letter, the Special Rapporteur notes that the World Heritage Committee will hold a discussion on potential reforms to site nomination criteria and the Advisory Bodies’ evaluation process at its next annual session. According to the information received, reform efforts have arisen mainly due to the difficulties in the nomination process of the Pimachiowin Aki site in Canada, an indigenous-led nomination developed through a collaborative process between the Government of Canada and First Nations. The site was nominated as “mixed property” for both, its cultural and natural significance under the Operational Guidelines for the Implementation of the World Heritage Convention. However, the World Heritage Committee reportedly deferred the Pimachiowin Aki nomination in large part because the Advisory Bodies were unable to concurrently consider natural and cultural values under the present criteria and evaluation processes.