ABSTRACT Purpose: to critically analyze whether the legislation regarding the Personal Frequency-Modulated (FM) System device encompasses most of the students with hearing impairment to facilitate the development of skills required for communication, literacy, and learning. Methods: a legislative analysis of the norms regarding the use of the Personal Frequency-Modulated (FM) System device. Relevant legislations were searched on public databases such as the Planalto and the Ministry of Health portals. Brazilian laws, ordinances, and relevant guidelines were consulted as well. Literature Review: Ordinance n. 1,274 of June 25, 2013, the CONITEC Report on FM in 2020 and GM/MS Ordinance No. 2,465, of September 27, 2021, which regulate the Personal Modulated Frequency System device, were identified. Conclusion: the initial ordinance of 2013, which regulated the Personal Frequency-Modulated (FM) System, was revised and updated, because it did not include children under six years of age, who are in the peak phase of oral language learning.