[1.12.2] Best practice for sending and checking against flagged chunks on client

This post is more for me to gather or discuss what others think might be better or alternative methods for preventing client movement within "claimed" chunks. My thinking was that on onEnterChunk or similar event (I would also need to handle onLogin and onTeleport) I could send the client a packet if they are approaching any "claimed" chunks with the cords for those chunks, then obviously client side check against these and prevent their movement. I was just wondering if there were any preferred or perhaps any helper methods that would assist in and make this easier for me to implement. Keep in mind I am new to Minecraft modding, but am quite experienced with programming in general.