How does the Project Manager or the Contractor notify of an ambiguity or inconsistency?
Either party can become aware of an ambiguity or an inconsistency between the documents that make up the contract (for ECC that is the conditions of contract, the Works Information, Contract Data part 1 and 2, the form of contract and any other document referred in those documents)
They have to give immediate written notification of the ambiguity or inconsistency.
The Project Manager gives an instruction to resolve the ambiguity or the inconsistency.
If the change results in a compensation event, the interpretation and the compensation event will be in the favour of the party that was not responsible for the inconsistency.