[AlphaCommerceHub] What does mean the «C» value in the «Mandatory» column of the API parameters tables?

Extensions AlphaCommerceHub
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1

The API parameters tables does not contain any legend.
I can guess, that «М» means «mandatory», and «O» means «optional», but what is «C» for?

2

As I understand, it means «conditional»:

These components and parameters may be mandatory, optional or conditional depending on the event/transaction.

alpha.pwstaging.com.au/docs/api-integration-guide#api-reference

3

Yes, my guess was right, I have confirmed it by the AlphaCommerceHub support:

C stands for conditional.
This becomes mandatory depending on other factors.