Any person determined by the Secretary to be responsible for causing an incident shall immediately undertake to remove such oil pollution to the Secretary's satisfaction. If the person responsible fails immediately to undertake to remove the oil pollution to the Secretary's satisfaction, the Secretary may undertake the removal of such oil pollution and may retain agents and contractors for such purpose who shall operate under the direction of the Secretary. The Secretary may authorize a third person, affected by such oil pollution, to expend funds to remove said oil pollution at the expense of the person responsible for same. All moneys expended by the Secretary under this section and recovered under § 6205 of this title are hereby appropriated to the Department of Natural Resources and Environmental Control to carry out the purposes of this chapter.