When a published documentt is opened for maintenance:
Insert a heading before rule (x.0)
Insert a heading after rule (1A)
Void a deleted clause rule
when voiding a heading title at the moment the completed sub structures is deleted and all sub-headings are voided. Consider to keep the content so that a user can copy / drag the paragraphs somewhere else
Floating Heading rule
keep a heading at the end of a document , i.e. renumber it