These cities should not be large cities, nor small towns; they should be average in size.

They should only be built at a marketplace and if there isn't one, they must make one there.

They should only be built at a water source and if there is none, water must be brought there.

If the city's population decreased, other people must be brought to replace them. If the population in the region was small, they bring Kohanim, Leviim and Yisraelim there.

(R. Nechemia): One may not make there an olive press or a grape storeroom. The Chachamim permit it.

They may not make ropes there and they may not make there glass vessels so that the Redeemer of the Blood does not frequent the stores there.