The constitutional dysfunction of the Regional Representative Council of the Republic of Indonesia has resulted in weak regional representation in national policy. This study employs a normative legal methodology with a legislative. conceptual and comparative law approach based on Konrad Zweigert’s theory of legal style; it analyzes the transformation of the Regional Representative Council by drawing on the model of the Spanish Senate. The results of the study indicate that the Spanish Senate possesses authoritative procedural leverage, whereas in Indonesia, the absence of such leverage results in regional aspirations being consistently dominated by political party coalitions within the People’s Representative Council. Through this strengthening, the Regional Representative Council transforms into a functional counterbalance that ensures justice for all regions of the archipelago. The novelty of this study lies in its use of a comparative law approach based on Konrad Zweigert’s theory of legal style to analyze the strengthening of the Regional Representative Council’s authority, using the Spanish Senate as a relevant institutional model. Unlike previous studies, which generally focused only on the limitations of the Regional Representative Council’s authority or proposed strengthening it through constitutional amendments or Constitutional Court rulings. The contribution of this study is to provide a conceptual model for the restructuring of the Regional Representative Council’s authority as a check-and-balance institution against the political dominance of the People’s Representative Council and political parties and thereby strengthening Indonesia’s bicameral system.