Documenting Working Volume of a Vessel in an IQ protocol

If there is a regulation requirement to have the working volume as part of the IQ of a vessel. If the answer is YES, do it need to be part of the nameplate or a design document could be use as a verification method.

If it need it to be part of the nameplate of the vessel…and it’s not…should a test to verify the working volume based on the volume calibration of the level transmitter could be done instead?

Thanks in advance for your help