First you need to enable the "authorization process" which can be found under "project parameters" in the Configuration Menu.
Then you must configure each status. Begin by first selecting the status that follows this particular status.
Next, add the conditions for each status (such as "start date") in order to get approval from other users.
Finally, decide how many users are needed to authorize each status update.
If the status conditions are met there will be a "pending authorization" notification that arises.
The Authorizing will be available in MY AUTHORIZATIONS, and you may choose to accept or decline the status update.