Is it true when cargo is accepted the IAC representative must visually inspect the exterior for signs of tampering?

Yes, it is true that when cargo is accepted, the Indirect Air Carrier (IAC) representative is required to visually inspect the exterior for signs of tampering. This inspection is part of the security protocols established by the Transportation Security Administration (TSA) to ensure the safety and integrity of air cargo. Any signs of tampering should be reported and addressed before the cargo is accepted for transport.