Variations to the Contract
No change to the contract has effect unless it has been agreed, confirmed in writing and signed by the Parties, except for changes provided for by the conditions of contract themselves such as compensation events or PM instructions changing the Scope.
Formal contract amendments require signed agreement by both Parties. This does not apply to changes properly made through the contract mechanisms such as PM instructions or implemented compensation events.
Verbal agreements or unsigned written agreements to change the contract are ineffective. Ensure any intended contract variation is formally documented and signed by both Parties.
📖 This summary is for reference. For the full, authoritative NEC4 contract text — including all amendments, guidance notes, and flow charts — visit the official NEC website.
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