Hmmm 30 seconds seems a bit short to me... I can see this going down as so...
SL: *stealthily going into cap point with head on a swivel*
Noob squad member other side of map: 'REQUEST ORDER! REQUEST ORDER! REQUEST ORDER!'
Server: SL you have 30 seconds to comply!
SL: Awkwardly tries to push Q on point currently capping by looking up into the sky.
Enemy player: pew pew pew *teabag*
Maybe 1 minute time limit?
When you give the order you shout "Capture/Defend this objective!" so any stealth will go out of the window. Normally you would have marked the target before getting in stealthily, but it would only take one noob at a different flag to disagree with your choice and you can then either lose the squad leader position or give yourself away.
Timeout should be 2 mins at least.