**Mandatory**

Request a node to report size and offset for its decision matrix. 

 | Data byte | Description   | 
 | :---------: | -----------   | 
 | 0 | Node address. | 

The following format can be used for nodes on a Level II segment as a midway between a full Level II handling as specified in Class=1024 and Level I. 

 | Data byte | Description | 
 | :---------: | ----------- | 
 | 0-15 | GUID.       | 

A node that does not have a decision matrix should return zero rows.
