Orach Chaim 340:10-342:1 - Shabbos: Gathering, Tearing, Taping; Nullifying Vows; Leniencies During Twilight
Orach Chaim 325:15-326:7 - Shabbos: Benefiting from Non-Jews, Bathing, Washing, Mikvah Friday Night, Showers, Swimming
Orach Chaim 324:12-325:4 - Shabbos: Feeding Animals, Inviting Non-Jews to Eat, Benefiting from Non-Jews