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Prior approval for all business travel is required for absences of employees from the campus or other designated headquarters for periods of half a day or more during the normal working period, whether or not there is a cost to The University. Non-employees and students not traveling as employees (traveler types N and S on an electronic Request for Travel Authorization) are not required to have prior approval before claiming travel reimbursements. The Office of Accounting does not require travel authorization for personal absences such as vacation.