Complex sentence: In 2013, the Irish government announced that companies which incorporate in Ireland must be tax resident, with effect on 1 January 2015 for newly incorporated companies, and 2020 for companies with existing operations in Ireland.
Split into simpler sentences: In 2013, the Irish government announced that companies which incorporate in Ireland must also be a tax resident there. This counter-measure took effect in January 2015, for newly incorporated companies, and will take effect in 2020 for companies with existing operations in Ireland.