MLC have no age limits. Anyone can have one at anytime.
One thing I heard is NEVER mention a MLC to someone you suspect of going through one.They will take a great offense to this and it will be counter-productive. For the person in the midst of a MLC they would categorize it as anything BUT a crisis! For them it is awakening. They feel great about the changes they are instituting and they think they are moving forward better than ever. So for the LBS so say "I know you are having a MLC" or "You are just having a MLC" or any other statement worded similarly, it will likely just infuriate them. So do not mention it no matter how much you might want to.
M(53), W(54),D(19) M-23, T-25 Bomb Drop - Dec.23, 2017 Ring and Piecing since March 2018