A method for determining priority of use of network resources used by a Mission Critical, MC, service in a network , the method being performed by a first MC service server being assigned a priority arbitration role and a second MC service server , the method comprising: obtaining (S204, S501), by the second MC service server , an indication of a need for an elevated high priority level of use of network resources for an MC service provided by the second MC service server , where the high priority level is above the level of priority that the second MC service server 200b can utilize without centralized priority arbitration and where the elevated high priority level of using the network resource corresponds to the priority of the MC service over other MC services that use or may use the same network resource; providing (S206, S502), by the second MC service server , a priority request for the elevated high priority level to the first MC service server ; obtaining (S106), by the first MC service server , the priority request from the second MC service server ; determining (S108, S503), by the first MC service server , based on at least one piece of property information provided in the priority request, whether to grant, reject, or queue the priority request for the elevated high priority level; providing (S110a, S504, S505), by the first MC service server , when determined to grant the priority request for the elevated high priority level, a first notification of the grant to the second MC service server and a second notification of the grant to at least one third MC service server ; and obtaining (S208), by the second MC service server , the first notification of the grant of the request from the first MC service server . obtaining (S204, S501), by the second MC service server , an indication of a need for an elevated high priority level of use of network resources for an MC service provided by the second MC service server , where the high priority level is above the level of priority that the second MC service server 200b can utilize without centralized priority arbitration and where the elevated high priority level of using the network resource corresponds to the priority of the MC service over other MC services that use or may use the same network resource; providing (S206, S502), by the second MC service server , a priority request for the elevated high priority level to the first MC service server ; obtaining (S106), by the first MC service server , the priority request from the second MC service server ; determining (S108, S503), by the first MC service server , based on at least one piece of property information provided in the priority request, whether to grant, reject, or queue the priority request for the elevated high priority level; providing (S110a, S504, S505), by the first MC service server , when determined to grant the priority request for the elevated high priority level, a first notification of the grant to the second MC service server and a second notification of the grant to at least one third MC service server ; and obtaining (S208), by the second MC service server , the first notification of the grant of the request from the first MC service server . <EOS>