Confusing normative and non-normative text, ending in ambiguity

"The use of ""example,"" to signal non-normative text is mixed with normative text, making it difficult for the reader to separate normative from non-normative material.

One example (by no means the only one): 7.3 Is Attribute:

• • • • • 
          Note that element names such as bool, int, or str are abbreviations for implied Contracts. However if an Object implements one of the primitive types, then it MUST use the correct OBIX type name. For example if an Object implements obix:int, then it MUST be expressed as <int/>, rather than <obj is=""obix:int""/>. Therefore it is invalid to implement multiple value types - such as implementing both obix:bool and obix:int.

I count:

Note - non-normative
MUST - normative
For example - non-normative
MUST - normative
invalid - ? normative or non-normative

In 69 words, the text switches from noromative to non-normative four (4) times and then ends up ambiguous as to normative or non-normative.
"