~judges or partners of a law firms who are women : judges and patners both all women

~women judges or partners of a law firm : judges only are women

but

As the chair of BBC and a board member, JP ~ : as the chair~ and (as) a board member -> as also modifies second N.
Why?
is it becoz of "the"?
then, what if I say that "as the chair~and the board"? Can not applied?