​Yes, the State's receipt policy for meal and incidental expenses has changed as provided in CalHR Manual Section 2203. To calculate your per diem allowance, enter the dates of your business travel along with the location, county, and city.Per diem employees are not eligible for the payment. 5.19 Compensation Study. GSA establishes the maximum CONUS (Continental United States) Per Diem rates for federal travel customers. Complete the form, making sure you have an adult witness sign to verify your wishes. Then return the form to CCCERA. Employees will submit a pre-approval request online with the documentation listed below BEFORE the expense is incurred. Calculate your per diem allowance for your trip. Simply enter your travel dates and details to find out your per diem allowance.