(a) In respect of each Billing Month, the Agency shall:
(i) calculate the amount of the penalty using data provided by the Company which, at the Agency's discretion, shall be subject to audit and/or check by the Agency; and
(ii) notify the Company of the amount of the penalty so calculated.
(b) The Agency's calculation under paragraph 11.3(a) shall be conclusive unless within five (5) Business Days of receiving notice under paragraph 11.3(a)(ii) the Company serves a notice of objection on the Agency specifying its objections, the corrections which it believes should be made and its reasons.