I believe the owner has the rights to the voucher as the tenants may just be temporary occupants of the apartments.
Likewise, when owners received rebates for utility bills and town council monthly fees, the owner has the right to keep these and still charge tenants for their monthly utility usage accordingly. High utilities directly corresponds to higher depreciation for equipment such as washing machine, air conditioner, oven/hob, television etc… which the owner may need to replace if faulty.
Owners are also liable to pay for income tax, property tax and also monthly maintenance fees/SCC fees which may amount to $300-500 per month depending on the type of property that tenants need not to bear.
If tenants want claim to CDC voucher, then they just have to be an owner to their own property.