I heard that you should not 5 hour before and after.
On another poll, I hear that you can masterbate, but just not ejaculate.
And on another, guys that masterbated less during a PE period typically made more gains than those who did more.
I guess it makes sense from the perspective that you may be overworking the penis and not giving it enough time to recover in between jelq sessions.
My guess is that the younger you are, the less time you need to recove. I am not that young anymore.
As for me, I am experimenting by only jelqing M, W, Fri, and only jerking on the morning of those days. (I usually PE at night) That way I have one complete day of rest without touching the penis. I do my stamina work that day.