1. Alliance Leaders and R4 members can apply to participate in battle at one Lv. 1 Security Center and one Lv. 2 Security Center respectively during the registration phase. 2. During the registration phase, alliances can select three battle time slots for each security center. 3. If the alliance successfully occupies a security center in the previous event, those security centers will be automatically registered for the next event. 4. Aside from the automatically registered security centers, alliances can newly participate in battle at two security centers in every event. 5. There is no limit to the number of automatically registered security centers, 6. Once the battle time for the security center is confirmed, and until the alliance's security center battle schedule ends, leaving or joining the alliance is not allowed.