Under ICC-ES Rules of Procedure, it is generally true that test reports in support of evaluation-report applications must come from laboratories accredited (for the specific test method under consideration) by an accreditation body that is a signatory to the Mutual Recognition Arrangement (MRA) of the International Laboratory Accreditation Cooperation (ILAC). As regards factory inspections, ICC-ES Rules of Procedure state that third-party inspection agencies must have a contractual relationship with ICC-ES and must be accredited by a signatory to the ILAC MRA.
ICC NTA  is an approved testing agency and can offer testing services for a variety of building, plumbing, and environmental products.
To search for other Labs/Inspection Agencies accredited by the International Accreditation Service, click here .
When a report applicant desires to use a nonaccredited laboratory, as allowed in Section 4.2 of the Rules of Procedure for Evaluation Reports, ICC-ES must be contacted prior to the commencement of any testing. The on-site assessment will be done by ICC-ES or its representative immediately before or at the time of testing, and the laboratory will be assessed, using the ICC-ES Nonaccredited Laboratory Checklist (right click here  and save the checklist), to determine whether the laboratory complies with ISO/IEC 17025 for the work in question. In the case of nonaccredited laboratories, the acceptance of test reports by ICC-ES shall pertain only to the test method and test specimens under consideration during the on-site assessment of the laboratory.