Question juridique clé
Whether the appellant had a guarantor position under the construction safety ordinance and accident insurance rules
Solution extraite
The ordinance governed duties of employers and employees in a contractual employment relationship; it did not directly impose such duties on the appellant toward an independent contractor's worker.
Motifs extraits
The victim had no employment contract with the appellant and was an independent contractor. Relying on the construction safety ordinance to derive a direct guarantor duty therefore violated federal law.