The T-Mark is based on any valid, applicable standard in combination with all the related services such as first factory inspections that are offered with GS- mark and BAUART-mark. Since the introduction of this test mark, its recognition has widely spread beyond the American borders and is therefore being used as a neutral "third party approval". This mark is unambiguous and international and represents a solid basis for future national / international requirements. The principle of integrating regular spot checks into an approval, assures both the client and the buyer of continued compliance. This system guarantees the quality of the test-mark and therefore represents a credible marketing tool with widely spread acceptance of the basic principle of "test + control = quality".