We may make an eruv with demai, with first tithe whose terumah has been taken, and with second tithe or consecrated produce that were redeemed; and Kohanim — with challah or with terumah. But not with untithed produce, nor with first tithe whose terumah has not been taken, nor with second tithe or consecrated produce that were not redeemed. If one sends his eruv with a deaf-mute, a mentally deranged person, or a minor, or with someone who does not accept eruv, the eruv is not valid. But if he instructed another to receive it from him, the eruv is valid.