Applicability of social security chapters to establishments by employee thresholds, hazardous occupations, and sector specific worker categories. Applicability of social security chapters is determined by establishment thresholds and occupation: Employees Provident Fund applies at twenty or more employees; Employees State Insurance at ten or more employees with single employee coverage for notified hazardous occupations and optional plantation inclusion; Gratuity and Maternity Benefit apply to specified sectors and shops/establishments with ten or more employees; Employee's Compensation applies where Chapter IV does not; separate chapters cover construction workers, unorganised/gig/platform workers, and employment information services.