International Building Code 1712.1
Where required. Where proposed construction is not
capable of being designed by approved engineering analysis,
or where proposed construction design method does not comply
with the applicable material design standard, the system of
construction or the structural unit and the connections shall be
subjected to the tests prescribed in Section 1714. The building
official shall accept certified reports of such tests conducted by
an approved testing agency, provided that such tests meet the
requirements of this code and approved procedures.