Declaring that he was opposed to using this unusual animal husbandry technique to clone humans , he ordered that federal funds not be used for such an experiment—although no one had proposed to do so—and asked an independent panel of experts chaired by Princeton on President Harold Shapiro to report back to the White House in 90 days with recommendations for a national policy on human cloning. （1999年卷）

他宣称自己反对利用这种非同寻常的畜牧技术去克隆人，他还下令禁止使用联邦资金做这样的实验——尽管没有人提议要那样做——并要求由普林斯顿大学校长哈罗德 · 夏皮罗领导的独立专家小组在90天内就有关克隆人的国策问题拿出建议，并向白宫汇报。

请问句子中had proposed是表示与过去事实相反的虚拟语气吗？