All functions in the API-MS-Win-Security-SDDL-L1-1-0 set are documented exports from ADVAPI32 version 5.0 and higher:

All continue to have non-trivial implementations exported from ADVAPI32 in version 6.1 and higher.

New Locations

Non-trivial implementations of all functions in this API Set are exported from SECHOST version 6.1 and higher.

Schema Redirection

The Windows 7 schema redirects this API Set to SECHOST. Thus: