Usage of CollInquiryQualifier (896) in CollateralInquiry[BB] message

Imported from previous forum

Hi,

The Collateral Inquiry message contains a repeating group called NoCollInquiryQualifier (938) and CollInquiryQualifier (896). The CollInquiryQualifier has 8 enumeration defined. I would assume that if CollInquiryQualifier = 0, which is Trade Date, that it should be possible for the Inquirer to specify a trade date. However this is not allowed.

What is the usage of this repeating group?

Thanks
Hiran