http://www.legislation.gov.uk/nisr/2018/68/contents/made
The New NAV List (Time of Valuation) Order (Northern Ireland) 2018
en
Government Printer for Northern Ireland
2018-03-28
RATES
This Order specifies 1st April 2018 as the time by reference to which net annual values are to be ascertained for the purposes of the new NAV list coming into force on 1st April 2020.