I contacted a member of our network team. Noted below is guidance that was offered:
In general, most of the information is not mandatory, so it does not need to be provided. For those fields that are required, the supplier is the one that controls the process and can provide the details.
However, this is question rather general and as such, a variety of the scenarios come into play, such as commodity, transport type, or whether or not the supplier manages the 3PL. Knowing the choreography of the specific buyer and supplier will determine the appropriate option.
More information is available in the Release Guides at Ariba Knowledge. Please note that access to Ariba Knowledge is available to those users with a corporate account.
Ariba Exchange Community Manager