diff --git a/appendix.md b/appendix.md
index f0c596e..0860d12 100644
--- a/appendix.md
+++ b/appendix.md
@@ -8,27 +8,46 @@ class: license-types
 All licenses described in the choosealicense.com [repository](https://github.com/github/choosealicense.com), in a table.
 
 <table border style="font-size: xx-small">
+{% assign types = "permissions|conditions|limitations" | split: "|" %}
 <tr>
   <th>License</th>
-  {% assign types = "permissions|conditions|limitations" | split: "|" %}
+  {% assign seen_tags = '' %}
   {% for type in types %}
     {% assign rules = site.data.rules[type] | sort: "label" %}
     {% for rule_obj in rules %}
+      {% if seen_tags contains rule_obj.tag %}
+        {% continue %}
+      {% endif %}
+      {% capture seen_tags %}{{ seen_tags | append:rule_obj.tag }}{% endcapture %}
       <th style="text-align: center; width:7%">{{ rule_obj.label }}</th>
     {% endfor %}
   {% endfor %}
 </tr>
 {% for license in site.licenses | sort: 'path' %}
   <tr style="height: 3em"><td><a href="{{ license.id }}">{{ license.title }}</a></td>
+  {% assign seen_tags = '' %}
   {% for type in types %}
     {% assign rules = site.data.rules[type] | sort: "label" %}
     {% for rule_obj in rules %}
-      <td class="license-{{ type }}" style="text-align:center">{% assign req = rule_obj.tag %}
-      {% if license[type] contains req %}
-          <span class="{{ req }}">
-            <span class="license-sprite {{ req }}"></span>
-          </span>
-      {% endif %}</td>
+      {% assign req = rule_obj.tag %}
+      {% if seen_tags contains req %}
+        {% continue %}
+      {% endif %}
+      {% capture seen_tags %}{{ seen_tags | append:req }}{% endcapture %}
+      {% assign seen_req = false %}
+      {% for t in types %}
+        {% if license[t] contains req %}
+          <td class="license-{{ t }}" style="text-align:center">
+            <span class="{{ req }}">
+              <span class="license-sprite {{ req }}"></span>
+            </span>
+          </td>
+          {% assign seen_req = true %}
+        {% endif %}
+      {% endfor %}
+      {% unless seen_req %}
+        <td></td>
+      {% endunless %}
     {% endfor %}
   {% endfor %}
   </tr>