ICAS is a voluntary membership organization for chartered accountants that was created by Royal Charter in 1854. ICAS has members in the UK and more than 100 countries around the world. ICAS is an educator, examiner, regulator, and thought leader. It regulates its members and their firms and is an RQB and RSB in accordance with the UK Companies Act 2006. It is also a PAB and RAB under the Companies Act 2003 in Ireland. In addition to being a member of IFAC, ICAS is a member of the Accountancy Europe and CCAB.