Ivan Mažuranić, a Croatian Ban who reigned from 1873 to 1880, implemented significant reforms in education, administration, and judiciary as part of his political program aimed at providing a modern legal framework for Croatian autonomy. During the second year of his reign, on August 19, 1874, Ban Mažuranić proposed the draft Act on the organisation of public schools and teacher training schools, which was adopted and confirmed by the Austrian Emperor and Hungarian-Croatian King Francis Joseph I on October 14, 1874. This Act is considered to be the first Croatian autonomous school law and one of the most liberal school laws in Europe, establishing schools as secular institutions. While many provisions of that Act remain applicable in today's Croatian educational system, they sparked some serious debates and protests across social classes at the time. A qualitative comparative analysis of this Act and the current Act on education in primary and secondary schools will compare the legislative frameworks for encouraging creativity in education and enabling the autonomous work of teachers. By enacting this law, Ban Mažuranić demonstrated his commitment to fulfilling his election promises. Along with other laws enforced in judiciary and administration, this Act paved the way for the modernization of the former Croatian state, aligning it with European standards of a modern civil state.