"Where a portion of the Work which has been subcontracted by the
Contractor is not being prosecuted in a manner satisfactory to the City, the
subcontractor shall be removed immediately on the written direction of the Engineer
and shall not again be employed on the Work."
"No subcontractor will be recognized as such, and all persons engaged in the Work of construction will be considered as employees of the Contractor, and the Contractor will be held responsible for their subcontractors' work, which shall be subject to the provisions of the Contract Documents."
How are "in the work" and "on the work" different?
This is from a legal contract, so it's worth noting that "Work" has been capitalized because the term has probably been specifically defined earlier in the contract, giving it a particular meaning for this document.
I don't believe there is any real difference in the use of "on" and "in", except that "…all persons engaged in construction will be…" is the slightly more natural form in the second case.
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