The 2nd Thematic ECHA Conference is free of charge, but pre-registration is required. Please register ASAP! The registration deadline is the evening of 14 March 2021. After that you can only request registration at ECHA2021Budapest@tehetseg.hu.
The link provided here directs you to the website of Matehetsz (one of the organisers) where you can register for the Conference.
Thanks for your intention to participate.