A shipper is loading a specification cargo tank with a hazardous liquid. What must the tank display regarding its inspection history?

AAMVA CDL Manual Sec 9.5.1 (nhcdm.pdf p.9-12)

A cargo tank that has gone too long without re-testing could have undetected structural weaknesses, corrosion, or valve problems that increase the risk of a leak or rupture. The visible re-test date gives drivers, shippers, and inspectors a quick way to confirm the tank is still within its safe testing window before it is loaded again.