In the Module properties under the "Events" tab is a script handle marked OnPlayerRest. This is where you can make scripts to do things to the PC when they start to rest, end their Rest, or Cancel their rest. This is a basic script that will check for an Item the PC must have to be able to rest. The Item in this example is FOOD. Change that to the TAG of the item you are looking for. Or you can eliminate / add to the list.