(Mishnah): If a Yisrael lives in a Chatzer with a Nochri (i.e. their houses open to the same Chatzer), or with one who does not acknowledge [the enactment of] Eruv (i.e. a Kusi), the Nochri [or Kusi] forbids the Yisrael [to transfer between his house and the Chatzer, unless he rents the Nochri's Reshus for Shabbos];

R. Eliezer ben Yakov says, he does not forbid unless [at least] two Yisraelim live in [different houses open to] the Chatzer and forbid each other [from carrying without an Eruv. An Eruv is invalid unless they rent the Nochri's Reshus.]