Summary

Yosef Karo Translation:Shulchan Aruch — Orach Chaim 346…

However, one who stands in the private domain and inserts, removes, passing, or throws something to the public domain via a place of exemption, or the reverse, is liable. Similarly, one should not stand in the place of exemption and take an object from someone standing in the public domain and give it to someone standing in the private domain, or the reverse.
Source: Wikisource

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