As a tax expenditure of the Taxes Consolidation Act 1997, Section 481 is subject to the requirements of the Department of Finance tax expenditure guidelines. The Tax Expenditure Guidelines can be found at: http://budget.gov.ie/Budgets/2015/Documents/Tax_Expenditures_Oct14.pdf.
As a requirement under the guidelines, reliefs such as section 481 are required to be reviewed periodically. A full ex post analysis and review of section 481 will be undertaken in line with the tax expenditure guidelines prior to any announcement on the extension of the relief.
The most recent Report on Tax Expenditures can be found at: http://budget.gov.ie/Budgets/2018/Documents/Report_on_Tax%20_Expenditures_2017.pdf.