until the Attorney General appoints a new chairperson. (4) Compensation Members of the task force may be allowed travel expenses, including per diem in lieu of subsistence, at rates authorized for employees of agencies under subchapter I of chapter 57 of title 5, United States Code, while away from their homes or regular places of business in the performance of services for the task force. (c) Duties The duties of the task force are as follows: (1) To study violence against and involving law enforcement and first responders. (2) To make recommendations on steps that can be taken to limit such violence, including assessing— (A) the causes for, the frequency of, and the types of attacks against law enforcement officers and other first responders