The U.S. Department of Transportation’s Federal Aviation Administration (FAA) announced that Indonesia complies with International Civil Aviation Organization (ICAO) safety standards and has been granted a Category 1 rating.

The FAA first assessed Indonesia’s civil aviation authority in September 1997 and found it in compliance with ICAO standards and then lowered the rating from Category 1 to Category 2 in April 2007. While under a Category 2 rating, the country either lacked laws or regulations necessary to oversee air carriers in accordance with minimum international standards, or its civil aviation authority – a body equivalent to the FAA for aviation safety matters – was deficient in one or more areas, such as technical expertise, trained personnel, record-keeping, or inspection procedures.

The Category 1 status announced is based on a March 2016 FAA assessment of the safety oversight provided by Indonesia’s Directorate General of Civil Aviation. A Category 1 rating means the country’s civil aviation authority complies with ICAO standards. With the International Aviation Safety Assessment (IASA) Category 1 rating, Indonesian air carriers that are able to secure the requisite FAA and DOT authority, can establish service to the United States and carry the code of U.S. carriers.

As part of the FAA’s IASA program, the agency assesses the civil aviation authorities of all countries with air carriers that have applied to fly to the United States, currently conduct operations to the United States, or participate in code sharing arrangements with U.S. partner airlines, and makes that information available to the public. The assessments determine whether or not foreign civil aviation authorities are meeting ICAO safety standards, not FAA regulations.

In order to maintain a Category 1 rating, a country must adhere to the safety standards of ICAO, the United Nations’ technical agency for aviation that establishes international standards and recommended practices for aircraft operations and maintenance.