Durability test.

37-02-01-08. Durability test. Samples shall be exposed to the sun at an angle of forty-five degrees to horizontal and facing south per American Society for Testing and Materials, ASTM D 1014, Method of Conducting Exterior Exposure Tests of Paints on Steel. DURABILITY TEST PERIODS Minimum Test Period, months: Location Fluorescent Reflective Outside in Midwest or 12 24 outside in Miami, Florida 6 12 General Authority: NDCC 39-21-50 Law Implemented: NDCC 39-21-50