The Association of Chartered Certified Accountants (ACCA) has recently revised its '12 Tenets of Tax' to reflect the current tax landscape and the new pressures facing governments. The tenets include efficiency, justice, simplicity, transparency, certainty, fairness, sustainability, participation, proportionality, and consistency. These principles aim to provide a clear exposition of what makes an efficient and just tax system in the 21st century. The report also highlights the importance of ACCA's mission to support its members and students in developing successful careers in accounting and business, with the skills required by employers.