may not exceed 50% of the per diem rate published on http://ec.europa.eu/europeaid/funding/about-calls- tender/procedures-and-practical-guide-prag/diems_en - The Contracting Authority reserves the right to reject payment of per diem for time spent travelling if the most direct   route and the most economical fare criteria have not been applied.   - Specific security measures in high risk countries as quoted in the Incidental Expenditures in the Terms of Reference.  6 Provision for expenditure verification - must cover expenditures incurred in the course of the contract for expenditure verifications undertaken by  external auditors; it cannot be decreased in the course of the contract.  3 of 2