Just mentioned this ingame - Player Owned Stations that are placed in Hisec space require the owner corporation to have standings as I have set out below with the FACTION that owns that part of hisec (Amarr, Caldari, Gallente or Minmatar). POS's can only be placed in 0.7 sec space or lower.
0.7 space requires 7.0 Faction Standing
0.6 space requires 6.0 Faction Standing
0.5 space requires 5.0 Faction Standing
0.4 space requires 4.0 Faction Standing
In addition they require other things, that I shall expand upon in a while (playing eve, watching footy and forum posting...)