Sri Lanka has become a party to the Convention on Biological Diversity (CBD) by signing the Convention in June 1992, and ratifying it in March 1994. The Ministry of Mahaweli Development and Environment is the National Agency designated to the CBD.

As a Party to the CBD, especially under the Article 18(3), the Government of Sri Lanka is required to set up and operate its National Clearing House Mechanism.

Further to decision X/15 of the CBD CoP, its mission is to contribute significantly to the implementation of the Convention on Biological Diversity and its Strategic Plan for Biodiversity 2011-2020, through effective information services and other appropriate means in order to promote and facilitate scientific and technical cooperation, knowledge sharing and information exchange, and to establish a fully operational network of Parties and partners.

In order to fulfil the above requirements, Biodiversity Secretariat of the Ministry of Mahaweli Development and Environment established this National Clearing House Mechanism and it plays a crucial role in promoting and facilitating scientific and technical cooperation and exchange of information among all stakeholders.