Reading from AD7606B and timing details

Hi, 

Could you please let me know at what timing can I get data?

I am not able to understand the relation/difference between tD_SCK_DO and tH_SCK_DO. 

I understood that Data is held for min 8 ns after SCLK rising edge, so does it mean that we can read >0ns after SCLK rising edge.

What do tD_SCK_DO indicate does it say the data is valid for max 15 ns after SCLK rising edge.

 

Can we read data on Dout after SCLK rising edge >0n <15ns (In case of VDRIVE > 2.7 V).

Thanking you.