Usually, the validity period is not reflected on the third party test report, only the time of sample testing and the time of report issuance. There are some buyers will limit the use of the product report validity period, some buyers limited to 1-2 years, some buyers limited to the time shall not exceed 3 years, by the buyer's requirements.
Legal basis:
"Chinese People's **** and the State Environmental Protection Law" Article 42 Enterprises, institutions and other producers and operators emitting pollutants shall take measures to prevent and control waste gas, waste water, waste residue, medical wastes, dust, malodorous gases, radioactive substances generated in the course of production and construction or other activities as well as noise, vibration, optical radiation, electromagnetic radiation and other pollution and harm to the environment.
Enterprises and institutions that emit pollutants shall establish a responsibility system for environmental protection, and clearly define the responsibilities of unit heads and relevant personnel.
The key emission units should be in accordance with the relevant provisions of the state and monitoring specifications for the installation and use of monitoring equipment, to ensure the normal operation of monitoring equipment, save the original monitoring records.
It is strictly prohibited to discharge pollutants illegally through concealed pipes, seepage wells, seepage pits, irrigation or tampering, falsification of monitoring data, or improper operation of pollution prevention and control facilities to avoid supervision.