then you should get some help... lol
1 - There must be communication between the stock issuer and the holders. No more.
2 - If the current holder (not owner) issues tokens backed by the original token (stock in this case), they should manage how to do this for their token holders.
3 - Same as 2 but for on the next layer
4 - Same as 3
...
If somebody in the chain of issuance fails to comply, penalty.