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In 90.1-2010 Table 11.3.2A Systems 10 and 11 are both listed with Cooling Type: 'Direct Expansion' - but without Note "C" below the table. Other systems (3,4,6,8,9) are all also DX but have a reference to Note 'C'. I cannot determine why systems 10 & 11 do not. The User Manual offers no insight either. This holds true in the corresponding tables in 90.1-2013 & 2016. Can any one shed some light on this logic or reasoning?

In 90.1-2010 Table 11.3.2A Systems 10 and 11 are both listed with Cooling Type: 'Direct Expansion' - but without Note "C" below the table. Other systems (3,4,6,8,9) are all also DX but have a reference to Note 'C'. I cannot determine why systems 10 & 11 do not. The User Manual offers no insight either. This holds true in the corresponding tables in 90.1-2013 & 2016. Can any one shed some light on this logic or reasoning?