What qualifies the option to isolate the relevant meaning?

The Compilation Method: Narrator Tiers, Justified Repetition and Abridgement

• The pertinent phrase can be quoted even if an attached exception is dropped
• Partial quotation is allowed only after the full report has already been cited once
• The excerpt can preserve the intended sense and necessary context
• A paraphrase can be substituted and presented as the report’s wording