The three immigration functions regulate various matters regarding the movement of people leaving, entering, and staying in the territory of the Unitary State of the Republic of Indonesia and various matters concerning the supervision of foreigners within the territory of the Unitary State of the Republic of Indonesia. The implementation of the three immigration functions is one of the most important aspects to achieve or create national security in the immigration aspect, Law No. 6 of 2011 concerning immigration including a policy formed to realize better immigration. Explaining the three immigration functions, it is contained in Article 1 Paragraph (3) of Law Number 6 of 2011 which reads that "The Immigration function is part of the affairs of the state government in providing immigration services, law enforcement, state security, and facilitating community welfare development.. The implementation of the three immigration functions should be a support in order to make immigration in the city of lhokseumawe more optimal, but in reality the implementation of the three functions of immigration in the city of lhokseumawe has not been carried out optimally and is not in line with the policies in Article 1 Paragraph (3) of Law Number 6 Year 2011, and there are still many obstacles and other obstacles that cause the application of this tri-role of immigration to not take place optimally. The results of the study concluded that (1) the implementation of the tri-immigration functions in Lhokseumawe City had not been carried out optimally and had not been in line with Article 1 Paragraph (3) of Law Number 6 of 2011. (2) In the implementation of the tri-immigration functions, various obstacles were encountered, namely: : The area that is the responsibility of the Immigration Office Class II TPI Lhokseumawe covers 1 city and 2 regencies namely "Lhokseumawe City, North Aceh Regency and Biruen Regency", coordination factors where there is a lack of cooperation in two-way communication between immigration and the community and community role factors which is sometimes the lack of public awareness to report to the immigration office when there are foreigners living in their area, which has resulted in the three immigration functions in Lhokseumawe City not being optimal.(3) There are various efforts in the implementation, for example: immigration counseling which intends to provide an understanding of immigration, the implementation of the Foreigner Reporting Application (APOA) which is believed to be very supportive of the immigration authorities in terms of controlling foreigners in the work area of the immigration office in Lhokseumawe City, organizing The Immigration Administration (TAK) action which intends to reduce foreigners who can threaten security and order cannot exist in Indonesia, implementing cooperation with the relevant agencies is one of the right things to support the Lhokseumawe Immigration Office in carrying out its duties and create a Foreigner Monitoring Team (TIMPORA).
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