International Organization for Standardization (ISO)
Latest
ISO 7591:1982
Scope
Specifies the provisions applicable to registration plates. Compliance with national regulations for dimensions, shape, letters, and numerals shall be checked on a completely finished plate by the competent authorities. Includes photometric and colorimetric properties by day and night. Describes sampling and various tests.
ISO 7591:1982 history
1982ISO 7591:1982 Road vehicles; Retro-reflective registration plates for motor vehicles and trailers; Specification