Tailoring refers to the process by which a security control baseline is modified based on all but one of the following: Response:

The security categorization of the information system is used to select the initial security control baseline (e.g., Low, Moderate, High baseline) as per NIST SP 800-53, not as a factor by which that chosen baseline is then modified through the tailoring process itself. Tailoring modifies the chosen baseline based on other factors like scoping, applicability, and compensation, but not the initial categorization.

The application of scoping guidance is a legitimate tailoring activity, where controls are deselected if they are not applicable to the system's scope.

The specification of compensating controls is a valid tailoring method, allowing alternative controls to be used when a primary control cannot be implemented.

The specification of organization-defined parameters in controls is a direct part of tailoring, where generic controls are made specific to an organization's environment.