As far as I understand the rules:
Allowed (your choice of whether to have them allowed or not):
1. Culturally linked start
2. AI respawn
3. Map conditions (age, water %, etc.), but the map must be computer generated (no custom maps).
No choice:
1. Preserve Random seed must be ON.
2. Allow culture conversions must be ON. (PTW has this option)
3. Accelerated Production must be OFF.
4. PTW special victory conditions must be OFF. (capture the princess, victory point locations, elimination, regicide, mass-regicide).
5. Civ-Specific abilities must be ON.
6. All normal victory conditions (domination, culture, spaceship, diplomatic, conquest) must be ON.
7. Opponents must be randomly selected.