And be it further enacted by the Authority aforesaid That upon Payment or Tender of such Sums of Money to be ascertained assessed or appointed as aforesaid or upon leaving the same in the Hands of the Commissioners Clerk for the time being for the Use of such Person or Persons as the said Commissioners shall appoint the same to be paid unto it shall be lawfull to and for the said Undertaker or Undertakers and his and their Workmen Servants and Agents to doe all and every such Act Matter and Thing in order to the makeing the said River navigable and continueing and supporting the Navigation thereof as by the Commissioners or any Five of them shall be thought requisite or necessary.