As functions as a conjunction and it does indeed bring in additional facts to the previous statement. There is a group of expressions that do that in case where facts are known to the reader as well as the speaker.Originally Posted by peteryoung
as agreed upon
There is no subject it after as and the verb is used in a passive form.
I am sending you a check for $200 as previously discussed.
The meeting will take place at 2pm, as agreed.