10/20/20 - Added - Wishing for Youthful Vigor at the wishing well is not allowed. (A sim must be in the household, die a unique death, be invited back into the household. Any other way of getting a ghost into the household is not allowed.)
11/18/20 - Updated to clarify that the marriage move-in screen is not allowed. This is because it didn't come up until late in the challenge, and we felt it was too late to change the rules. If you brought sims into your household through the marriage move-in screen, you are allowed to restart your challenge.