The force restrictions are the same as every other army except Bretonnians and High Elves. They don’t get the bonus dispel dice, although this thread might now turn into a big debate about that…
Here’s everything you need to know about the dispel dice debate:
In Ravening Hordes, which was the booklet in which the Chaos Dwarf army list first appeared, there was also a Dwarf army list. The Dwarfs’ special rules included them getting 2 bonus dispel dice. The Chaos Dwarf army list, written at the same time and published in the same book, contains no such special rule. It was therefore clearly not the intention of the original authors for Chaos Dwarfs to get the additional dice.
As has been said: use the usual restricitons (3+ core, 0-4 special, 0-2 rare, 0-1 Lords, 0-4 Heroes, but 1-4 characters at 2,000 points etc) and no bonus dispel dice.