Except as otherwise specified in the Purchase Contract, Contractor will not deliver an invoice to Company for Scope until acceptance by Company of such Scope as agreed in the Purchase Contract. If Company uses ERS, Contractor will, if requested by Company, notify Company of completion of Scope under the Purchase Contract through “Self Billing” in Company's ERS system as required by Company. Otherwise, Contractor will invoice Company (electronically where available) in accordance with Company’s reasonable requirements. Contractor will be responsible for arranging foreign exchange clearance and for meeting costs in the country to which funds are being remitted. Company may execute any reasonable payment instructions, but reserves the right to charge Contractor for complying with such instructions.