Which rule type would you check first in an ACL evaluation process?

In the context of the ACL (Access Control List) evaluation process in ServiceNow, the first rule type to check is the requires role rules. This is because these rules are essential for determining the basic access rights associated with a specific role before any other conditions are evaluated. When a user tries to access a resource, the system first verifies if the user possesses the requisite roles that grant them permission to perform the action or view the data.

If the user lacks the necessary roles, access is denied at this initial evaluation stage, thus preventing any further checks, such as condition rules or script rules, from being processed. This prioritization reflects a fundamental security principle: access control must first validate the user's identity and permissions by checking roles before proceeding to other criteria that may also affect access.

The role verification stands at the forefront because it simplifies the access control decision-making process; if a user does not meet the role requirements, it signals a definitive restriction without needing to delve deeper into specific conditions or script evaluations.