Section $3(5)$ fo the OSH Act provides that the federal government is not an "employer" under the Act; it is silent on whether the Act can be enforced against private employers. What does this mean to private employers working on federal property? $($Select the best answer$)$

Group of answer choices

The OSH Act does not apply to the private employer unless regulated by another federal agency and exempt under section $4($b$)(1).$

The OSH Act does apply to the private employer unless regulated by another federal agency and exempt under section $4($b$)(1).$

The OSH Act does not apply to the private employer unless regulated by another federal agency.

The OSH Act does not apply to the private employer.