Just where are Adobe's geospatial extensions to ISO 32000?

Reader GCP Maps provides a pointer to the where to actually see the Adobe extensions to ISO 32000, which I'll repeat here: Section 8.8.1 Geospatial Features in Adobe Supplement to the ISO 32000 BaseVersion: 1.7 ExtensionLevel: 3 [PDF]. That's page 49 if you want to jump right to it...