diff --git a/roles/0-init/tasks/main.yml b/roles/0-init/tasks/main.yml
index a2fadff04..40c82d2d3 100644
--- a/roles/0-init/tasks/main.yml
+++ b/roles/0-init/tasks/main.yml
@@ -33,10 +33,23 @@
   setup:
     filter: ansible_local
 
-# 2020-01-21: checks 46+46 vars...for now...expect validate_vars.yml to change!
-- name: Pre-check that IIAB's "XYZ_install" + "XYZ_enabled" vars (1) are defined, (2) are boolean-not-string variables, and (3) contain plausible values
+# 2020-01-23: checks 53 + 53 + up-to-53 vars for now...validation will improve!
+- name: Pre-check that IIAB's "XYZ_install" + "XYZ_enabled" vars (1) are defined, (2) are boolean-not-string variables, and (3) contain plausible values. Also checks that "XYZ_install" is True when "XYZ_installed" is defined.
   include_tasks: validate_vars.yml
 
+- name: Verify 'apache_install: True' and 'apache_enabled: True' if 'nginx_enabled: False' -- e.g. for Apache testing of older playbooks lacking full NGINX support
+  assert:
+    that: apache_install and apache_enabled or nginx_enabled
+    fail_msg: "PLEASE CONFIRM 'apache_install: True' AND 'apache_enable: True' IF 'nginx_enabled: False' e.g. IN: /etc/iiab/local_vars.yml"
+    quiet: yes
+
+# SEE: https://github.com/iiab/iiab/blob/master/roles/nginx/README.md
+- name: Verify 'apache_install: True' and 'apache_enabled: True' if any of {DokuWiki, Elgg, Lokole, Moodle, Nextcloud, Node-RED} are set to install
+  assert:
+    that: apache_install and apache_enabled or not (dokuwiki_install or elgg_install or lokole_install or moodle_install or nextcloud_install or nodered_install)
+    fail_msg: "PLEASE CONFIRM 'apache_install: True' AND 'apache_enable: True' IF YOU'RE TRYING TO INSTALL ANY OF {dokuwiki, elgg, lokole, moodle, nextcloud, nodered} e.g. IN: /etc/iiab/local_vars.yml"
+    quiet: yes
+
 - name: Set top-level variables from local_facts for convenience
   set_fact:
     xo_model: "{{ ansible_local.local_facts.xo_model }}"
@@ -109,12 +122,6 @@
     gui_port: 443
   when: adm_cons_force_ssl | bool
 
-# SEE: https://github.com/iiab/iiab/blob/master/roles/nginx/README.md
-- name: "Set 'apache_enabled: True' if any of {DokuWiki, Elgg, Lokole, Moodle, Nextcloud, Node-RED} are set to install"
-  set_fact:
-    apache_enabled: True
-  when: dokuwiki_install or elgg_install or lokole_install or moodle_install or nextcloud_install or nodered_install
-
 - name: Turn on both vars for MySQL (mandatory in Stage 3!)
   set_fact:
     mysql_install: True