They have an important coordination role between the IOTA Secretariat and their respective tax administration for facilitating the exchange of information, as well as assisting in the identification of the common needs of members. By promoting IOTA within their tax administrations, they also ensure better participation in the development of IOTA and active involvement in seminars and working groups.
The Principal Contact Persons (usually members of international departments of tax administrations) contribute to finding speakers and experts for IOTA events, responding to requests for information, providing news and articles and sharing IOTA publications within the tax administration, promoting IOTA and assisting the Secretariat in the organisation of the IOTA events in their country.