The voucher is linked to the Tomorrowland Account of the main buyer. The Main Buyer will be able to use the voucher during the 2022 Global Journey Ticket Sale for a Discover Europe Package or any other package. The new booking does not necessarily have to contain the same people that would have attended Tomorrowland 2020.
You are not obliged to redeem the Travel voucher. If you did not use the Travel voucher within a period of 12 months after it has been issued, you have the right to request a reimbursement for the total amount of your travel voucher. This will be possible via your Tomorrowland Account. In that case, TL Travel will have a period of 6 months after the expiry of the 12-month period to make the cash refund to you.