How soon can we apply for TRV

[kapatid]

My friend's visa got approve recently.
How soon can he apply for TRV for his wife and children?
Does it have to be inland?
Does he have to be inside Canada to do it?
Can he apply as soon as possible?

 

[scylla]

What kind of visa did your friend get approved? PR? Work visa? Something else?

 

[kapatid]

What kind of visa did your friend get approved? PR? Work visa? Something else?

Student visa