CRDF funds provided in support of US participants can be used for project-related travel expenses, including airfare, per diem, insurance, visa fees, and related costs (such as mileage, taxis, tolls, etc.). Original receipts confirming claimed expenses are required for all project-related travel expenses (including toll fees). Mileage expenses will be compensated at the current USG rate. Please note that CRDF generally reimburses US Principal Organizations for expenses incurred. Authorization to reimburse an individual participant must be provided, in writing, to CRDF by the U.S. Principal Organization before any payment will be made to an individual.