We can make biographical fields (e.g. First Name) required for constituents, which will also make these fields required on any relationships, including Spouse.  The example below works for First Name, but it could also apply to other constituent biographical fields that are shared with individual relationships.

To make this field required, follow these steps:

  1. Select Config>Fields>Constituent
  2. Locate First Name field
  3. Mark Required checkbox
The change is automatically saved in Configuration.