The FIM published the supplementary regulations for Kaplice.
https://motokros-kaplice4.webnode.cz/
Order your tickets online: https://www.tickets-fimsidecarcross.com/en
Route to Kaplice with Google maps: https://goo.gl/maps/v4ZPpa9G8qZcDkhg9
Entry list for Kaplice:
Website from the organizer: GP Kaplice, CZE - info and more
Moderators: Chris Helm, Rien.nl