In the WAP 2.0 standards document 'WAP-191-WML-20000219-a.pdf', the conformance rules WML-66 and WML-71 are same. But one is 'M'andatory, and other is 'O'ptional.

When I created script in NMIT4.1 using this rule, no error/warning message has been shown. Please give me an insight into this.