The short answer: A tenant improvement (TI) submittal clears plan review when it shows, clearly and completely: a
code analysis (occupancy classification, code editions, occupant load), compliant
means of egress sized to that load,
accessibility compliance for the altered space and path of travel, coordinated
MEP (mechanical, electrical, plumbing — including any new equipment loads and fixtures), and the
completeness items reviewers expect (
required sheets, title-block/stamp info, and consistency between drawings). Most TI rejections aren't exotic — they're a wrong or missing occupant load, egress that doesn't match the new layout, accessibility gaps in the altered area, fixtures not reconciled to the new occupancy, or missing/inconsistent information. Running these checks before submittal is what avoids the resubmittal-and-re-review cycle that delays the permit.
The recurring causes: occupant load not updated for the new use; egress that fit the old layout but not the new; accessibility not addressed in the altered area; fixtures not matching the new occupancy; and plain incompleteness. Each is catchable before submittal. See also what plan reviewers check.
General guidance under the model codes; your AHJ's adopted codes, amendments, and submittal requirements govern. Verify against your codes of record.