Years back a facility had to apply for a “Special Permit” (example of a permit at link) to get an exemption for their HAZMAT Attendance requirements and then it was very specific to the loading/unloading station and came with many caveats. Now 49 CFR 177.834 has this exception built into the standard and it reads:
Unloading hose(s) can eliminate the HAZMAT Attendance requirements
