4.5 Modifications of the Employer's Facility
(a) In the event the Contractor would like to upgrade or modify or perform such improvement to the substantial part of the Employer's Facility, the Contractor shall submit document including but not limitation drawings, calculation sheet, related procedures, method statements and modification costs to the Employer's for approval prior such modifications have been commenced. The Employer shall determine at its own discretion whether to be accepted such upgraded or modifications proposed by the Contractor or not