Tents are not permanent and do not join the Shabbat area, so everyone measures the area from the beginning of their tent only, and the members of the Yishuv cannot add the tents to extend the area, but measure from the edge of the city only.
But if three conditions are met, the tents can be added to the Shabbat area, the first condition is that it is near the city and joins the city, and you don't want to create a compound in itself from tents that were set up in an uninhabited place, the second condition is that it be an area protected from floods, that the tents do not face the fear of floods, and the condition The third is that the tents be protected from thieves, or stand in a place where there is no fear of thieves.
Although in the event that they made a perimeter partition around the tents, there is a change in the law and must be discussed according to the details of each individual case.
Sources: See Och Sus Shatzach, to the PMSH Haza C. Ki 22, and it is also proven from the Rashba that the B.I. "F Kamsh Hazo'a there.
And military personnel do not have a right to their tents as permanent tents, even though the soldiers do according to the instructions of the army, that means in the raids in the gathering areas that God in the above-mentioned B.I. Sus.
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