This study aims to analyze the disharmony of interpretation between the Ministry of Manpower and immigration authorities regarding the use of Visit Visa index C.18 for foreign experts or technicians in Indonesia. This issue arises due to differences in perspectives in determining the scope of permitted activities for foreign nationals, which potentially leads to legal uncertainty, opportunities for misuse of residence permits, and weak supervision of foreign nationals. This research employs a normative juridical method with statutory and conceptual approaches by analyzing applicable regulations and legal concepts related to institutional authority and policy harmonization. The results indicate that the lack of alignment between immigration and labor policies creates multiple interpretations in the implementation of Visa C.18, resulting in inconsistencies in supervisory practices. Therefore, regulatory harmonization is required through clear limitation of permitted activities and strengthened inter-agency coordination. This study contributes to the development of immigration law studies, particularly in promoting legal certainty and improving the effectiveness of foreign national supervision in Indonesia.
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