List TA happening after application?

My honors mammalian physiology (really just human physio) asked me to TA his course. It's really cool because we get to lecture (250 students) when he's gone and, because he's the president of the faculty senate, he's gone a lot. This is going to be happening in the fall. Is it still OK to list this on the application even though it won't happen until later?

Source: Student Doctor Network - January 18, 2017 Category: Universities & Medical Training Authors: Endoxifen Source Type: forums