The United Nations Mission in East Timor (UNAMET) was established by Security Council Resolution 1246 on 11 June 1999 for a period up to 31 August 1999.

[2] To organise and conduct a popular consultation on the basis of a direct, secret and universal ballot, to ascertain whether the East Timorese people accept the proposed constitutional framework providing for a special autonomy for East Timor within the unitary Republic of Indonesia or reject the proposed special autonomy for East Timor, leading to East Timor's separation from Indonesia, in accordance with the General Agreement and to enable the Secretary-General to discharge his responsibility under paragraph 3 of the Security Agreement.

A civilian police force of 271 (at full deployment) was provided by Argentina, Australia, Austria, Bangladesh, Brazil, Canada, Egypt, Ghana, Ireland, Italy, Japan, Jordan, Malaysia, Mozambique, Nepal, New Zealand, Pakistan, Philippines, Portugal, Republic of Korea, Russian Federation, Senegal, Spain, Sweden, Thailand, United Kingdom, Uruguay, US and Zimbabwe.

In addition, 50 Military Liaison Officers were provided by Australia, Austria, Bangladesh, Brazil, Denmark, Ireland, Malaysia, New Zealand, Portugal, Russian Federation, Thailand, United Kingdom, US, Uruguay.

The international team was completed by the deployment of about 420 UN volunteers from 67 countries providing district electoral officers, support staff and medical services.