The International Residential Code and the International Building Code each have a list of hazardous locations where you needs safety glazing, in most cases this means tempered glass.
Safety glazing is required in all types of doors except swinging jalousie doors.
Safety glazing is required in in walls and doors surrounding hot tubs, bathtubs, showers, steam rooms and other similar locations where the bottom of the glazing is at less than 60″ above the standing or walking surfaces.
Safety glazing is required for glazing with an edge within 24″ of doors if the bottom edge is less than 60″ above the floor.
Safety glazing is also required where you have glazing that meets all of these conditions; the pane is over 9 square feet, the bottom edge is less than 18″ off the floor, the top edge is more than 36″ above the floor, and the glass is within 36″ horizontally of a walking surface. Basically really large panes of glass that are close to the floor need to be looked at.
Any glazing in railings must be safety glass. Safety glazing is required within 36″ horizontally of stairs, ramps and landings where the glazing is less than 60″ above the surface. It is also required within 60″ of the bottom of the stairs where the glazing is less than 60″ above the surface.
Glazing in walls and fences around pools, hot tubs and spas where the glazing is less than 60″ above the walking surface and within 60″ of the edge must be safety glazing.
There are a handful of exceptions in specific cases so let me know if you need help finding one.