Defining the parameters of the owner's right of use in a residence that is rented out- what kind of items count for this law and how does it work in a hotel setting?
When an owner retains rights of usage in a residence he is renting out- does the renter need to contribute to the eruv? Does the owner need to live in the courtyard?
Establishing an eruv on someone's behalf who doesn't know that it's being done for them- application to chatzer, mavoi, techum, city Eruv- and the case of someone who explicitly does not want to be accounted for in the eruv