my AI 306 Review BP 23 and associated text, Section 5.7.

Change:

For authoring convenience, Assertion Authors may allow the association of 
an assertion to multiple policy subjects. If an assertion is allowed to be 
associated with multiple policy subjects as is possible with WSDL, then 
the Assertion Authors have the burden to describe the semantics of 
multiple instances of the same assertion attached to different policy 
subjects at the same time in order to avoid conflicting behavior. 
Best Practice 23: Define Semantics of Attachment to Multiple Policy 
Subjects
If an assertion is allowed to be associated with multiple policy subjects, 
the assertion author should describe the semantics of multiple instances 
of the same assertion attached to multiple policy subjects at the same 
time. 

to:
For authoring convenience, Assertion Authors may allow the association of 
an assertion to multiple policy subjects within the same context of use 
(e.g in the same WSDL description). If an assertion is allowed to be 
associated with multiple policy subjects as is possible with WSDL, then 
the Assertion Authors have the burden to describe the precedence rules 
when multiple instances of the same assertion are attached to different 
policy subjects in order to avoid non-interoperable behavior. 
Best Practice 23: Define Precedence Rules for Attachment of an Assertion 
type to Multiple Policy Subjects
If an assertion is allowed to be associated with multiple policy subjects, 
the assertion author should describe the precedence rules for multiple 
instances of the same assertion attached to multiple policy subjects in 
the same context. 
Cheers,
Christopher Ferris
STSM, Software Group Standards Strategy
email: chrisfer@us.ibm.com
blog: http://www.ibm.com/developerworks/blogs/page/chrisferris
phone: +1 508 234 2986