This document contains guidance notes on the NEC3 Supply Contract, which explain how to complete the SSC when it is used for a simple, low risk contract. The accompanying flow charts depict the procedures followed when using the contract. Construction Clients' Board endorsement of NEC3 The Construction Clients' Board (formerly Public Sector Clients' Forum) recommends that public sector organisations use the NEC3 contracts when procuring construction. Standardising use of this comprehensive suite of contracts should help to deliver efficiencies across the public sector and promote behaviours in line with the principles of Achieving Excellence in Construction.