The contractor was required to strictly follow notice requirements in the EPC contract, including notifying the employer of any issues within short timeframes. This was important for establishing entitlement to claims for delays or additional costs. While the contractor notified some issues, it failed to properly substantiate notices and many instructions from the employer's representative were verbal rather than written as required. Without clear written instructions, the contractor could not prove its entitlement to adjustments. Proper notice, record keeping and following contractual procedures for notifications are essential for contractors to reserve rights and support claims on restrictive contracts.