This is what it says on the RCI Extra Vacations section below a bunch of available units from now until January 2016. Other Mayan resorts say the same thing with their location & resort numbers. I do not have any deposits pending right now so I could not check for exchanges, but have seen comments about this elsewhere.
You can only confirm into The Grand Mayan Nuevo Vallarta Resort (7486 & 7491) once in a 3 year period. Maximum 2 units per year total allowed at All Mayan Properties. If multiple units the 2nd unit requires mandatory Guest Certificate; for consecutive weeks, unless the owner/co-owner is not traveling. Multiple/Consecutive Reservations must be confirmed at the same Resort.
Close date confirmations made 48 hours prior to arrival will not be accepted. Violations to any rule will be cancelled.
Extra fees for: Valet Parking, Internet, Gym, SPA, Tennis, Golf and Safe Box. The location of the unit will be assigned upon arrival directly by Mayan. RCI DOES NOT ASSIGN THE UNIT. Resort applies a US$500 Resort Fee per unit, per week for residents in Mexico. Resort Fee Includes: One-way transportation Airport to Hotel, transportation throughout the Resort, local phone calls, basic Internet, Gym Access, Press summary, cover charge for Santuario, a welcome drink and boarding passes/faxes printing. For non-residents within Mexico the resort fee is US$75.
Important: Mayan Owners are not allowed to confirm into any Mayan property thru RCI (neither using a regular Mayan week in exchange, or thru Extra Vacations).