If you don't currently have any
DVC contracts, you'll have to buy the initial contract as one big contract. So if you were buying a 160 point contract, it would have to be 160 points. If you are getting the special 100 point contract, it will have to be 100 points. If you already had a contract of any size, you could divide the contract into as many contracts as you wished as long as they were not less than 25 points.
So if it is an add-on contract (to any DVC resort), you could split it up. If it is a master contract, you can't split it up.