# California legacy SMHS 1915(b) authority-period history

`medicare_silver.ca_smhs_1915b_legacy_history_period` · State programs · status live · 13 rows

Production-reconciled and exact-replay-idempotent lossless chronology layer for the CA-17 initial authority through CA17.R09 temporary extensions. It preserves source-stated period text, independently parsed start/end dates, evidence basis, original-package recovery status, warnings, exact raw manifest JSON, semantic hashes, and M-2 lineage without manufacturing continuity or turning reconstructed dates into original authority documents.

**Grain.** One frozen corpus snapshot and source-stated legacy SMHS authority period.

| column | type | meaning |
|---|---|---|
| corpus_snapshot_date | date |  |
| authority_id | string |  |
| period_text | string |  |
| period_start | date |  |
| period_end | date |  |
| date_basis | string |  |
| original_package_status | string |  |
| partial_original_evidence | string |  |
| warning | string |  |
| is_reconstructed_date_basis | boolean |  |
| is_original_date_basis | boolean |  |
| manifest_sha256 | string |  |
| raw_history_period_json | string |  |
| semantic_row_sha256 | string |  |
| observed_period | date |  |
| asserted_at | date |  |
| effective_period_start | date |  |
| effective_period_end | date |  |
| cms_vintage_sequence | int |  |
| parse_revision | int |  |
| parser_artifact_hash | string |  |
| source_url | string |  |
| sha256_content_hash | string |  |
| source_id | string |  |
| is_current | boolean |  |
| bronze_object_key | string |  |
| s3_version_id | string |  |
| vintage_tag | string |  |
| drug_source_version_id | string |  |

Query it: `query_substrate` with `SELECT ... FROM medicare_silver.ca_smhs_1915b_legacy_history_period WHERE ... LIMIT 100`; read `describe_data_source("medicare_silver.ca_smhs_1915b_legacy_history_period")` first.