The Official The Sims 4 100 Baby Challenge [UPDATED ON DEC 29, 2018]

I just started this challenge and have really enjoyed it so far, even though I only have the fifth baby on the way. Would be easier if we still had the twin bug... Anyway, I was wondering if young adults who live in the household and are not the matriarch can have jobs? There's no mention of it in the rules and the rules don't state that young adults have to be moved out right away, either. I can age my first teen up soon and don't need to move her out to make room yet because it's going slow with single births only.