Grantees must establish timekeeping practices for employees paid in part or in whole with federal funds or whose time is being allocated as match on the grant. The regulations at 2 C.F.R. 200 section 430 (i), Standards for Documentation of Personnel Expenses, provide general guidance on timekeeping. They indicate that charges to grants for salaries and wages must be based on records that reflect the work performed, be supported by a system that provides reasonable assurance that the charges are accurate and properly allocated to the grant, reflect the total activity of the staff person, not just the activity related to the grant, and be incorporated into the official records of the grantee.