The Low-Noise Underground Research Laboratory (LSBB URL) in Rustrel (near Avignon, Southern France) is born from the reconversion of a command firing post of nuclear rocket. Since 1996, the site has been transformed in an international scientific facility for interdisciplinary research. Scientists working on different fields and from different countries are supervised by the engineer team of the LSBB. The LSBB URL wanted to point the competences of the lab and prove that their measures could be trusted. The accreditation according to the ISO 17025 didn’t appear suitable. Indeed, this well-known standard is not really suited to the needs of research lab and the work to set up for a first accreditation is consistent and costly. Working with partners in the field of public and private research, the CT2M has developed a new quality system fully compatible with the ISO 17025 but more suitable to establish with the concerned academic labs and private companies: The “Label Fiabilité Mesure”. The LSBB URL has obtained the graduation for the Label for its activity of measurement of gravity.