Last updated: 1st August 2021
The Blue Book is the handbook of of EBU permitted understandings, your first point of reference to find out what you can play in different events.
A summary of changes can be found here, Blue Book 2021 - summary of changes.
The 2021 version of the book (effective from 1st August 2021) is available here (you can right-mouse-click on the link and save the pdf to your own computer then open it from there).
Submitting a method
Additions and amendments to permitted methods normally take effect from 1st August and any applications to change anything need to be received by the L&E Secretary by the end of February. If you wish to apply for approval of any agreement not currently permitted you should send your application by email to firstname.lastname@example.org. You should include a logical defence to any agreement and indicate how it is to be shown on the system card. The Committee tend to look more favourably on applications that are not especially difficult to defend against.