Which of the following is not an industry standard but is important for defining how modern organizations work with vendors, suppliers, and contractors?

The integration agreement is not considered an industry standard, yet it plays a crucial role in how organizations collaborate with vendors, suppliers, and contractors. These agreements outline the terms, conditions, and technical specifications for integrating services or technologies provided by third parties into an organization's existing systems. They ensure that all parties clearly understand their responsibilities, interfaces, and any necessary compliance measures.

In contrast, the other options represent concepts or documents that may be more standardized in nature. For example, the attestation of compliance (AOC) is a recognized standard document used to demonstrate compliance with specific frameworks, while data sovereignty refers to the legal and regulatory control over data based on its geographic location and is governed by law. The statement of classification generally pertains to how data should be categorized based on its sensitivity and impact on an organization, often established within regulatory frameworks.

Thus, while the integration agreement is critical for operational clarity and effective collaboration, it lacks the status of a formal industry standard, making it a distinct but significant element in vendor relations.