Not sure if this is a family case but this example might help.
"Such further or other times as agreed between the parents in writing"
Meaning you're bound by the current orders unless you two agree on some form of extra time.
I doubt you will get an order that is so open ended to not "lock you into these condition's" Unless for instance you knew in 6 months time you were moving house therefore you might have the orders written to take this into account as you know it to be a certainty.