I'm told a closet, window and door are needed in Texas. Does anyone have any information about the requirements of the window? Does it have to open? I would think so for safety reasons, but I'm touring a number of new luxury townhomes that have a door, closet and access to a bath on the first floor ... but the window in the room on the first floor is fixed. Can it be a bedroom / sleeping room with a window that does not open? What is the source documentation .. who decides?