Investigators are responsible for ensuring that expenditure commitments do not exceed the available funds in their account. For research or education programs with employees, account funds will be obligated to cover anticipated payroll expenses for the next two months. These obligated funds will not be made available for other expenditures. If the total account balance falls to $2000 or less, the investigator will be contacted to make arrangements to add funds to the account or to make other arrangements for the payment of employees. For all accounts, any Check Requests or Purchase Orders that are submitted for payment from an account that does not have sufficient funds to cover the requested payment will be returned to the principal investigator without payment.