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

Location	Minimum Test Period, months: 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