Provided neverthelesse That this Act shall not extend to any Throwne Silke of the Growth or Production of Italy Sicily or Kingdome of Naples that shall be brought in or imported into England otherwise then by this Act is directed at or before the first day of September one thousand six hundred and ninety and which shall be proved by the Oath of the Partie his Servant or Agent to whome the same doth belong or appertaine to have beene provided and bought by his and their Order from England in some part or place in Italy Sicily or the Kingdome of Naples at or before the first day of June one thousand six hundred and ninety which said Oath the Commissioners of the Customs or any two of them for the time being are hereby impowered to administer