27.       A successor auditor may determine that he or she needs to perform procedures in addition to those specified in paragraph 26 of this standard to obtain a sufficient knowledge of the company's business and its internal control over financial reporting.  Depending on the nature of the company's business, its organization, its internal control over financial reporting, and the specific material weakness that is the subject of this engagement, a successor auditor may determine that he or she is not able to obtain a sufficient basis for reporting on whether a previously reported material weakness continues to exist without performing a complete audit of internal control over financial reporting in accordance with Auditing Standard No. 2.