I can see how you might be confused. The table is titled:
Electrically Operated Unitary Air Conditioners and Condensing Units -
Minimum Efficiency Requirements.

I remember asking the same question in 1994, "this table is for
single zone systems".

Actually a packaged single zone system is an "Electrically Operated
Unitary Air Conditioners and Condensing Unit Constant Air Flow System".

A packaged VAV system is an "Electrically Operated Unitary Air
Conditioners and Condensing Units Variable Air Flow System".

The the table doesn't distinguish between single zone, multi-zone,
constant flow, variable flow, etc.

And you are welcome.

>> Christopher Jones, P.Eng.