if cred.IsTemp() || cred.IsServiceAccount() {
		// For derived credentials, check the parent user's permissions.
		accountName = cred.ParentUser
	}

	roleArn := policy.Args{Claims: cred.Claims}.GetRoleArn()
	policySetFromClaims, hasPolicyClaim := policy.GetPoliciesFromClaims(cred.Claims, iamPolicyClaimNameOpenID())
	var effectivePolicy policy.Policy

	var buf []byte
	switch {

		// to widen its privileges.
		return false
	}

	isOwnerDerived := parentUser == globalActiveCred.AccessKey

	var err error
	var svcPolicies []string
	roleArn := args.GetRoleArn()

	switch {
	case isOwnerDerived:
		// All actions are allowed by default and no policy evaluation is
		// required.

	case roleArn != "":
		arn, err := arn.Parse(roleArn)