General restrictions:

2000 points
Mercenaries allowed
No allies
1000 points allowed on characters
No more than a total of 30% (600 points) of the points list may be spent on models with the Fly (x) special rule, this includes the full cost of characters with the Fly (x) special rule
No more than a total of 7 wizard levels
No unit may start with more than 30 models (not including characters)
Rule of 6 in Core choices, rule of 3 outside of Core choices

Army specific restrictions:

Cathay:

Chaos Dwarfs:

Daemons of Chaos:

Dark Elves:

High Elf Realms:

Sisters of Avelorn may not exceed more than 10 models for each unit (not counting characters)

Kingdom of Bretonnia:

Lizardmen:

Ogre Kingdoms:

Orc & Goblins Tribes:

No more than a total of 6 Fanatics
You may bring a total wizard level of 8
Troll Horde may bring as many wizard levels as they want
Units of Goblins (of any kind) may consist of 50 models (not counting characters)
Arachnarok Spider uses the Howdah rules for The Renegade Legacy Pack v1.0

Skaven:

The Empire of Man:

Tomb Kings of Khemri:

Vampyre Counts:

Warriors of Chaos:

Wood Elf Realms: