diff --git a/.pullapprove.yml b/.pullapprove.yml
index dfd8f3183a..40cc9f84f2 100644
--- a/.pullapprove.yml
+++ b/.pullapprove.yml
@@ -1126,12 +1126,32 @@ groups:
   #  Catch all for if no groups match the code change
   # ====================================================
   fallback:
+    # A group is considered to be `active` for a PR if at least one of group's
+    # conditions matches the PR.
+    #
+    # The PullApprove CI check should fail if a PR has no `active` groups, as
+    # this indicates the PR is modifying a file that has no owner.
+    #
+    # This is enforced through the pullapprove verification check done
+    # as part of the CircleCI lint job.  Failures in this lint job should be
+    # fixed as part of the PR.  This can be done by updating the
+    # `.pullapprove.yml` file cover the unmatched path.
+    # The pullapprove verification script is part of the ng-dev tool and can be
+    # run locally with the command: `yarn -s ng-dev pullapprove verify`
+    #
+    # For cases in which the verification check fails to ensure coverage, this
+    # group will be active.  The expectation is that this should be remedied
+    # before merging the PR as described above.  In an emergency situation
+    # `global-approvers` can still approve PRs that match this `fallback` rule,
+    # but that should be an exception and not an expectation.
     conditions:
       - *can-be-global-approved
-      # Groups which are found to have matching conditions are `active`
-      # according to PullApprove. If no groups are matched and considered
-      # active, we still want to have a review occur.
-      - len(groups.active) == 0
-    reviewers:
-      users:
-        - IgorMinar
+      # The following groups have no conditions and will be `active` on all PRs
+      # - `global-approvers`
+      # - `global-docs-approvers`
+      #
+      # Since this means the minimum number of active groups a PR can have is 2, this
+      # `fallback` group should be matched anytime the number of active groups is at or
+      # below this minimum.  This work as a protection to ensure that pullapprove does
+      # not incidently mark a PR as passing without meeting the review criteria.
+      - len(groups.active) <= 2
diff --git a/dev-infra/pullapprove/parse-yaml.ts b/dev-infra/pullapprove/parse-yaml.ts
index d733ab3ca4..9e63ce6a98 100644
--- a/dev-infra/pullapprove/parse-yaml.ts
+++ b/dev-infra/pullapprove/parse-yaml.ts
@@ -9,7 +9,7 @@ import {parse as parseYaml} from 'yaml';
 
 export interface PullApproveGroupConfig {
   conditions?: string[];
-  reviewers: {
+  reviewers?: {
     users: string[],
     teams?: string[],
   }|{