Rules

No cheating. Plain and simple, no money or mood cheats. You may use custom objects, as long as their price and mood effects are in line with similar ‘official’ objects. Objects purchased from the Sim Store are considered 'official' as well as the ones included with the game. 
Aging and story progression must be on and lifespans set to the normal level. 
You are allowed to play with any Mod that does not give you a signifigant advantage over a player without the mod. The only specific mod I know of at the moment, Awesome Mod, is allowed. 
The Legacy family must be the “Active Household” during the entire challenge. You may never switch the active household to another family. If you want to take a break from Legacy play, it is recommended you play in another saved game slot. 
No Ambrosia! Your sims may learn the recipe for Ambrosia, but may not cook or consume the dish. Nor may ambrosia be used to resurrect ghosts. 
You may not ressurect dead sims via the Science lab. 

I will probably not follow these exactly!