On 22 December 2017, President Trump signed into law extensive changes to the US tax system which could have a significant impact on the current and deferred taxes of entities with a US tax presence. These changes are known as the “Tax Cuts and Jobs Act” (the 2017 Act). The 2017 Act was substantively enacted for accounting purposes in 2017, and the impact of the tax law changes should therefore be reflected in financial statements at 31 December 2017.