Provided always and it is hereby further enacted That in all Cases where any further or other Provision or any Alteration is made by any other Act or Acts of Parliament now in being in relation to the said Duties upon Vellum Parchment and Paper such other Provisions or Alterations shall be observed and complyed with dureing the continuance of the Terme hereby granted in the same Duties Any thing herein contained to the contrary notwithstanding.