BookGUIRules is a rules plugin, where you need to accept the rules to play.
Highly configureable and 1.12-1.16 support.

ATTENTION: It needs ProtocolLib for 1.12.2!!!

Open a book to a player on his first join with the contents configured.
At the last page the player will be able to accept or decline the rules.
If a player wants to remove their accepted status, they can either type
/declinerules or type /rulebook to open the book again and click on decline.

There are also clickable Buttons in the book at the last page,

that run the command and close the book.
The player can type /rulebook to open the book again.
You can reload the plugin in-game and remove/add a
players status as accepted/not accepted. Full UUID support.

Commands:
/acceptrules - accept the rules
/declinerules - decline the rules
/rulebook - open the book again (if you didn't accept the rules it opens automaticly again)
/bookrules - admin command
/bookrules reload - reload the configuration
/bookrules status [player] - check the status of a player
/bookrules acceptrules [player] - accept the rules for a player
/bookrules declinetrules [player] - decline the rules for a player

Permissions:
bookrules.accept - /acceptrules
bookrules.decline - /declinerules
bookrules.rulebook - /rulebook
bookrules.onjoin - open the book when a player joins and didn't accept the rules
bookrules.onclose - open the book when a player closes it and didn't accept the rules
bookrules.commands - all /bookrules reload, acceptrules, declinerules
bookrules.reload - /bookrules reload
bookrules.status - /bookrules status [player]
bookrules.acceptrules - /bookrules acceptrules [player]
bookrules.declinerules - /bookrules declinerules [player]

prefix: Prefix showing on all commands (except /bookrules)
accept-text: Text on the last page of the book
accept-button: Text on the button placeholder <acceptbutton> and trigger for /acceptrules
decline-button: Text on the button placeholder <declinebutton> and trigger for /declinerules
kick-text: The kick message when a player declines the rules
no-permission: Message when a player doesn't have permissions for a command.
accept-message: Message sent when a player accepts the rules
already-accepted-message: Message sent when a player tries to accept the rules while he already accepted them
use-permissions: Should the permission bookrules.rules be enabled?
debug-mode: If enabled, outputs usefull information about what the plugin does
content: set the pages:
For each page you put the next number like in the default config. For each line in a page u put a - 'and here the line'. If the line doesn't fit, it will still be put in the next line in the book.
Just look and the defaults, there you can see it better.

The plugin supports PlaceholderAPI in the following strings:
accept-text, kick-text and content (the pages in the book).

To ask for support join my Discord server:
https://discord.gg/jTkfTDGr5c
To report issues please report them on GitHub:
https://github.com/Skyslycer/BookRules

Pictures:

Thanks for using my plugin!
I will try to fix issues as soon as possible if an issue comes up.