This Checklist sets out the procedure for obtaining and registering a Light Obstruction Notice (LON) under Rights of Lights Act 1959, including a summary of the 19 years and one day rule, the procedure for applying to the Upper Tribunal (Lands Chamber) (UT) for a definitive and/or temporary certificate, and the application for registration of the LON as a local land charge. From 12 April 2015, the responsibility for local land charges transferred to HM Land Registry. The Local Land Charges Rules 2018, SI 2018/273 (LLCR 2018), which are necessary to bring these amendments into operation, came into force on 6 April 2018. However, the provisions will only have effect in a local authority area after the Registrar has given notice in writing to the local authority that from the date specified in the notice the amendments are to have effect . This Checklist sets out the procedure for registering a Light Obstruction Notice where the Registrar has not given such notice in writing, and accordingly, where the process is