201. Local guard contracts abroad under diplomatic security program
“(3) in evaluating proposals for such contracts, award contracts to technically acceptable firms offering the lowest evaluated price, except that—
“(A) the Secretary may award contracts on the basis of best value (as determined by a cost-technical tradeoff analysis); and
“(B) proposals received from United States persons and qualified United States joint venture persons shall be evaluated by reducing the bid price by 10 percent;”