5. REQUEST FOR SERVICES, EQUIPMENT, OR SUPPLIES- Form FA-6-AP Requests for Services, Equipment or Supplies, Form FA-6-AP, shall be used by teacher sponsors and departments to secure ap- proval from the principal before placing orders with suppliers for services, equipment or supplies. Inasmuch as the principal shall have full responsibility for all phases of the operation of Internal Account Funds, a teacher sponsor or school activity shall never incur any expense or liability without first securing written approval by the princi- pal. Therefore, it is of the utmost importance that all concerned be informed and requested to adhere to this policy. If the three lines provided on the form for description of services, equipment or supplies are not sufficient to itemize all items requested, the items may be listed on a sheet attached to the form. Upon receipt of the invoice and completion of the check requisition, this request form shall be attached.