Do locations require inventory organizations to setup a default buyer?

Summary:

A location does not appear in the drop down when setting up default buyers under manage default buyer assignment rules. The location is not linked to an inventory organization. Are locations required to be mapped to a inventory org to setup default buyer rules? If not, how do you setup default buyer rules for non inventory org locations?

Content (required):

A location does not appear when setting up default buyers under manage default buyer assignment rules. The location is not linked to an inventory organization. Are locations required to be mapped to a inventory org to setup default buyer rules? If not, how do you setup default buyer rules for non inventory org locations?