International Standards on Auditing (ISA) are professional standards for the performance of financial audit of financial information. These standards are issued by International Federation of Accountants (IFAC) through the International Auditing and Assurance Standards Board (IAASB). According to Olung M (CAO - L) ISA guides the auditor to add value to the assignment hence building confidence of investors. International Standards on Auditing (ISA) are professional standards for the performance of financial audit of financial information. These standards are issued by International Federation of Accountants (IFAC) through the International Auditing and Assurance Standards Board (IAASB). According to Olung M (CAO - L) ISA guides the auditor to add value to the assignment hence building confidence of investors. The Audit Directive of 17 May 2006 is important in order to ensure a high quality for all statutory audits required by Community law requiring all statutory audits be carried out on the basis of all international auditing standards. The Directive has given implementing powers to the European Commission, in order to adopt 'en bloc' the ISAs in accordance with the Council Decision of 28 June 1999, also known as the 'Comitology Decision'.