Refund of Ticket Price and Compensations

What is the mechanism that the airline must comply with in the cases of refund of ticket price and compensations?

The Air Carrier shall refund the value of tickets or pay compensation stipulated in these Regulations by cash payment, bank transfer, bank checks or vouchers in accordance with the Customer’s wish within no later than )10) business days from the date on which the Air Carrier made acknowledgment of the Customer’s right.  In the event that a voucher is used, the Customer has the right to:
 A. Exchange it for cash at any office of the Air Carrier.
 B. Use it again without paying any additional fees for further usage.