" The "based on the above" refers to earlier clauses in the contract. So, with that given, I would word it: Based on the above, Company requests (the members of the company are acting in unison for the purposes of this contract, so the verb would be singular) Contractor to ensure that all site personnel are provided with safety shoes that comply with industry standards (or XYZ gov't safety dept. regulations, or whatever) on or before November 2010, at no extra charge to Company.
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