RCI Disclosure Document is on that How to Book RCI page. Expand the section on Know Before You Book & look for the link at the bottom.
From page 8, (Deposit First section, #2)
Deposit First Exchange Method
1. When Vacation Time, which has been submitted to
DVC Member Services by a DVC Member, is deposited by DVCMC with RCI, all rights to the use of same for the week(s) deposited are immediately assigned to RCI. RCI may use that deposited Vacation Time to obtain a Confirmation, to make the Vacation Time available to other RCI Members, or to otherwise use or dispose of the Vacation Time, in its sole discretion. Once Vacation Time is deposited by DVCMC with RCI, the Vacation Time may not be withdrawn; and, therefore, once a DVC Member deposits Vacation Time, it is a final transaction. Reservation of Vacation Time by or on behalf of DVC Members is subject to availability.
2. Vacation Time must be deposited with DVC Member Services no more than 11 months (7 months ifthe DVC Member is depositing Vacation Time from an Originating Resort other than his or her Home Resort), before the commencement date of the deposited week. Deposits of Vacation Time received by DVC Member Services from 45 days and until 14 days before the commencement date of the Vacation Time being deposited also are accepted; provided, however, that such deposits can only be used for an exchange that will occur from 44 days and until 24 hours in advance of the desired Vacation Time.
3. An exchange may be requested for the same time period or for a time period that has a comparable exchange value as the Vacation Time deposited. The exchange request may be placed at the same time that the Vacation Time is deposited or at any time thereafter, but no later than the end of the second calendar year after the date of the deposited Vacation Time.
4. DVC Members may place a request for an RCI Exchange into an RCI Member Resort that is affiliated with RCI Weeks with travel dates of up to 24 months in advance of the check-in date. DVC Members may place a request for an RCI Exchange into RCI Points and The Registry Collection RCI Member Resorts for travel dates of up to 10 months in advance of the check-in date.