The 2005 reform is, in my opinion, the one with the greatest legal significance of the seventeen changes made to the 1980 Fundamental Charter. I think so because that amendment finds, in the new Chapter VIII dedicated to the Constitutional Court, the most far-reaching modification that has been introduced into the Chilean regulatory system, at least since the Political Code of 1980 came into effect.
Cea Egaña, J. L. (2016). The most important constitutional change. Revista De Derecho Público, (69), Págs. 324–328. https://doi.org/10.5354/rdpu.v0i69.40212