Stage 1: the trigger event
In practice, it has often proven difficult for a party seeking to rely on a MAC clause to establish that the conditions for the trigger event were met. For example, in Decura v UBS (2015), an outsourcing contract contained a MAC clause allowing the customer, Decura, to terminate if its supplier, UBS, ceased to carry on a "material part" of its investment bank business and this had a material adverse effect on UBS's ability to market Decura's products. However, although UBS had significantly scaled back its activities in certain areas, the court found that it had not ceased to carry on any part of its business – and that, as a result, there was no relevant trigger event.
Stage 2: material adverse effect
With regard to the second stage of the test, convincing the court that the adverse effect has been sufficiently material will not always be straightforward either. The courts often interpret "material" as meaning "substantial" or "significant", which suggests a reasonably high threshold. For example, in the Decura case discussed above, the court concluded that even if the scaling back by UBS had amounted to a trigger event, it remained able to market Decura's products effectively and there was no material adverse effect on the latter. However, that is not to say that the threshold is virtually impossible to meet. For example, in a dispute between the European Medicines Agency (the EMA) and Canary Wharf over termination of a lease as a result of Brexit, the court found that although the contract had not been frustrated, Brexit had indeed had a material adverse effect on the EMA (although as the lease did not contain a MAC clause, this finding did not assist the EMA). To read more about that case, please see our discussion in this briefing.
The commercial context of the MAC clause is typically also significant; for example, where it allows one party (as will often be the case) to terminate or avoid its contractual obligations, this tends to make the courts incline towards a higher threshold. MAC clauses may also be found in a variety of different types of contract, ranging from licensing or supply arrangements (as in the PPLive case) through to loan agreements and M&A deals (although MAC clauses remain relatively unusual in an M&A context; whilst they are almost always included in loan agreements, lenders rarely invoke them, in part because of some of the difficulties highlighted in this briefing). This can also have a bearing on the interpretation of the clause.