The list of what I have known as a original rule of Puerto-Rico[the New buildings, the Nobles]

[wind4th]

1. Eight 'the nobles' buildings should be added with other drafted buildings without subtraction nor substitution.
2. The privilege of the captain, effect of lighthouse and harbor can't be adjusted when using 'royal supplier'.[ref. Table #22313004 Move #233-248]
3. Hunting lodge's function while being occupied by noble should be nullified when someone has equal number of plantation.[ref. Table #22113363 Move #342-344]
4. All plantations' reverse side are forest. There are no limitation of number of Forests.

I am not sure this is the original rule. But if it is, please change the rule as the original one.

[DrKarotte]

Accoeding to the original rule book I would say:

1. You are right.
3. The same here. You need the "emptiest" island.
4. Fortests are put on an empty field on your island, so the maximum would be 12, wouldn't it? But as I can see there is no limit apart from that.

2. I must look at the table, I do not fully understand this one.