Regulamento da CMVM n.o 10/2005 is a regulatory document that modifies two existing regulations, namely Regulamento da CMVM no 7/2001 and Regulamento da CMVM no 4/2004. The changes relate to corporate governance and disclosure requirements for companies. The amendments introduced new provisions regarding the responsibilities of directors, the composition and functioning of audit committees, and the disclosure of information to shareholders. The goal of these changes is to enhance transparency and accountability in corporate governance and to provide investors with more reliable information about the companies in which they invest. The amendments apply to all companies listed on the Portuguese stock exchange and aim to strengthen investor protection and confidence in the market.