Perhaps this can be cnsidered as a suggestin; When creating a customized output style, is there any way to add extra “fields” which are not already included in the reference type template (ex: add a “section title” to the “legal rule or regulation” reference type) (?)
Yes, you could either use one of the custom fields within the reference template or use one of the pre-existing fields. So in your case, for example, in the Legal Rule or Regulation reference type you could use any custom fields (1 through 8; refer to attached image) and name it “Section Title”.