If a person appoints a number of people to be his agents to perform a task and authorises each of them to act solitarily in the performance of that task, then any one of them can perform that task. In the event that one of them dies, the agency of the others does not become void. However, if it was said that they must perform the task together, or it was said in a general way, ‘You two are my agents’, they cannot act solitarily.
In the event that one of them dies, the agency of the others becomes void.