Home clubs must make at least 5% of the total approved UEFA capacity of their stadium available exclusively to visiting supporters in a segregated, safe area. In addition, unless otherwise agreed between the two clubs in question, visiting clubs are entitled to purchase up to 50 top-category tickets for their VIP supporters, sponsors, etc, but they are not obliged to take the full allocation (see Articles 17 and 25 of the UEFA Stadium Infrastructure Regulations and Article 19 of the UEFA Safety and Security Regulations).
Visiting clubs must, where relevant, sell their tickets by zone in order to facilitate the reallocation of unsold tickets. Visiting clubs that have requested an allocation of tickets for the whole or part of the segregated area may return any unused tickets to the home club without payment up to seven days prior to the match. After this deadline, the visiting club must pay for the whole allocation, irrespective of whether all the tickets have been sold.
The home club may reallocate tickets returned or not requested by the visiting club provided that all safety and security measures (as mentioned in the UEFA Safety and Security Regulations) are respected and that such tickets are not reallocated to supporters of the visiting club.
All visiting team ticket allocations and ticketing arrangements may be altered by written agreement between the two clubs concerned.