The greatest concern to an information security manager if omitted from the contract with a multinational cloud computing vendor would be the authority of the subscriber to approve access to its data. This is because the subscriber's data may be subject to different legal and regulatory requirements in different jurisdictions, and the subscriber may lose control over who can access, process, or disclose its data. The subscriber should have the right to approve or deny access to its data by the vendor or any third parties, and to ensure that the vendor complies with the applicable data protection laws and standards. The authority of the subscriber to approve access to its data is also one of the key elements of the ISACA Cloud Computing Management Audit
/Assurance Program1.
References = CISM Review Manual, 16th Edition eBook2, Chapter 3: Information Security Program Development and Management, Section: Information Security Program Management, Subsection: Cloud Computing, Page 142.