As explained in the change log "where the vaccine was administered" refers to the location. For the USCDI Facility Information data class and elements, the  US Core Location Profile  already supports Facility Name and has been updated to support Facility Identifier and Type. The  US Core Immunization Profile  has been updated to reference the US Core Location resource directly as a  Must Support  element, and the following US Core Profiles have been updated to  indirectly  reference the location/facility via  US Core Encounter Profile  as a  Must Support  element: US Core DiagnosticReport Profile for Laboratory Results Reporting US Core Immunization Profile ...