36.2 Report and Invoice
On the first Business Day of each Payment Period158 the Contractor shall submit to the Authority:
(a) a report showing for that Payment Period the Monthly Unitary Charge [and, individually, each item taken into account in calculating the Monthly Unitary Charge pursuant to paragraph 2.1 of Schedule 6 (Payment Mechanism)];159 and
(b) an invoice for the amount (if any) shown by the report as owing by the Authority to the Contractor and for any VAT payable by the Authority in respect of that amount.
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158 'Bill in month, pay in month' regarded as providing value for money for Authorities, but it is their discretion whether to adopt this approach.
159 Where the Payment Mechanism does not list such items, a specific list will need to be included at clause 36.2 (Report and Invoice).