Addressing #371

requirements/index.html

@@ -185,6 +185,7 @@ <h2 id="design_principles">Design Principles</h2>
 			<li>Improve the ability to support automated testing where appropriate and provide a procedure for repeatable tests when manual testing is appropriate.</li>
 			<li>Provide requirements to address functional needs, while avoiding or minimizing negative impacts on other functional needs. </li>
 			<li>Include accompanying documents that provide clear, concise, and findable technical information quickly in one place.</li>
+			<li>Normative requirements should be unambiguous so there is only one possible meaning for each requirement.</li>
           </ol>
           <p>The creation process for the guidelines should:</p>
           <ol start="7">