I am sorry you have not gotten an answer about this. I think that is because the Zastava M70 is not a gun many people would carry for self defense, which is where carry condition would really matter. It is a rather bulky, heavy (all steel) single action automatic that was aruguably about 40 years behind the state of the art when it was introduced in 1970. And it's in 7.65mm Browning, in a size category where many people prefer 9mm Short, if not 9mm Parabellum.
I had one for a while, and then just lost interest in it and sold it.
The manual safety on mine did not inspire confidence, because it was small and its movement was kind of floppy. And the M70 is derived from the Tokarev, which had a full-reach firing pin, so I would want to know if the Yugoslavians changed that before suggesting hammer-down carry on a loaded chamber. So that just leaves carrying it with a loaded magazine but an empty chamber. If your gun has a better made safety, or the Yugoslavs fixed the firing pin issue, then you could carry it however you liked. But it's a gun the Walther PP made kind of passe in 1929. The Czech CZ-50 and CZ-70 are better guns, and so are the basic Russian-type Makarov, and the Polish P-83 in 9mm Makarov.
PS - My Zastava M-70 came with a factory holster, but it was a basic European police leather flap holster, with a pocket for a spare magazine.