Direct Cal Poly to strengthen its policies and procedures for creating and retaining documentation, including introducing additional controls to help ensure that it appropriately creates and maintains all documentation necessary to support the allowability of travel expenses charged to sponsored programs. Updated procedures could include: • Requiring travelers to document the business purpose of each day of a planned trip before charging travel costs to NSF awards. • Implementing additional reviews for all airfare purchases, including requiring the reviewer to verify that the traveler purchased an economyclass ticket before charging the expense to an NSF award. • Verifying that subawardees claiming travel costs on federal awards provide sufficient documentation to support the allowability of claimed expenses.