These are contextual workshop preferences, not universal bans on garnish. A diagram does not settle how much expressed oil is appropriate.
Original synthesis from complete supplied-page reading and visual review; attributed source claims remain qualified.
Garnish can contribute a controlled aromatic cue, not just decoration. Examples include restraint with lemon oil in a Martini and shaking a grapefruit twist in Regal Amburana.
PDF 39–40,75,79,135; numbered body print page = PDF page −4
Functional garnish and aroma
Paraphrase fidelity and page locator checked against supplied PDF text and images; not independent factual/medical/legal validation.
No access / Whiskey Excerpts Database (USWA)
Located paraphrase, not a direct quotation. Full supplied-page text and visual review completed.
Evidence
Garnish can contribute a controlled aromatic cue, not just decoration. Examples include restraint with lemon oil in a Martini and shaking a grapefruit twist in Regal Amburana.
Location and context
PDF 39–40,75,79,135; numbered body print page = PDF page −4.
Source No access; synthesis 
The book combines several narrators. Attribute recipes and essays to their printed contributor; the source-level author credit does not erase that provenance.
Annotation
These are contextual workshop preferences, not universal bans on garnish. A diagram does not settle how much expressed oil is appropriate.
Verification checklist
No direct quotation, scientific validation, current operating instruction or public placement is claimed.