If Your Z Clause Needs Latin, It Probably Needs A Bin

2 Feb 2026 · 60 min
59:54

The sixth webinar in the series, hosted by Glen with panelists David Allen (SECA Southern) and Ben Walker (Gather), explores NEC4 Option Z additional conditions of contract. The session explains why Z‑clauses exist, how to assess the need for them, and presents a structured best‑practice workflow: identify the fault, consider alternatives, flow‑chart the change, use existing defined terms, and seek expert review. The presenters triage Z‑clauses into three informal buckets – boiler‑plate/legal‑insurance clauses, hard constraints, and process‑changing clauses – and discuss the risks of each, including ambiguity, adverse risk allocation, higher tender prices, reduced supply‑chain participation, and strained project‑manager authority. They illustrate problems with concrete examples (e.g., tightening compensation‑event notification periods, shifting liability for pre‑contract scope errors, deleting the mutual‑trust clause). Abrahamson’s risk‑allocation principles are applied to evaluate who should bear risk. The webinar stresses the importance of clear, plain‑language drafting, avoiding Latin and copy‑paste, and publishing the rationale behind any Z‑clause to build trust. Engagement with the supply chain and early market feedback are recommended to balance cost certainty with value for money. The session concludes with a reminder to follow NEC’s User Guide drafting advice and a preview of the next webinar on contract data.

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