Who registers the sales of an offplan property in Dubai?

My wife and I have recently purchased an apartment off-plan. Who is responsible for registering the unit on the off-plan register and who is responsible for the costs?

It is the responsibility of the developer to register the sale contract on the off-plan register once 25 per cent of the contract value has been paid to the developer. Upon registration, a certificate of registration is issued in the name of the purchaser, which gives the purchaser the security that the unit cannot be sold or alienated without his knowledge, provided the purchaser is not in breach of the sale contract, while also providing the protections afforded by the law in the case of cancellation of contract.

The registration fees of the off-plan sales contract are paid by the purchaser and amounts to 4% of the contract value, together with certain administrative charges. If the purchaser does not pay these fees or cooperate with the registration on the off-plan register, the developer will have the right to cancel the sales contract and retain 30%of the money paid by the purchaser