Or

WHERE

...

and [CORE_CO-PERSON].[D-O-B] <= datediff(yy, -16, getdate()) -- where DOB is less than or equal to todays date 16 years ago.

Edit:

After 3 years, someone caught that I had the right idea but the wrong function in the code above. This is what I should have posted here:

WHERE

...

and [CORE_CO-PERSON].[D-O-B] <= dateadd(yy, -16, getdate()) -- where DOB is less than or equal to todays date 16 years ago.