On 4 April 2016, building information modelling (BIM) level 2 became mandatory on all centrally-procured UK government projects. This means that, increasingly, the use of BIM will need to be reflected within contractual documentation throughout the construction supply chain and within the professional team. See Practice Note: What is BIM? It is important not to look for changes for the sake of change and at each stage of the contract it makes sense to consider what has changed, from the status quo, in contractual terms as a result of the introduction of BIM into a project. There are a number of areas, however, where amendments are likely to be required to ensure that the additional requirements of BIM are dealt with. This can be achieved with 'light touch' amendments to administrative clauses of the contracts or by more extensive amendment to include any early engagement and reflect the collaborative working requirements, depending on parties' preferences and the extent to which (and purposes for which) BIM is to be used—as a design and construction tool only or as something