Article 15. One of the Ministers of State, and two of the Secretaries of State, the latter to be changed yearly, shall constantly remain with the King while he resides in Sweden. They shall be subject to the same obligations and to the same constitutional accountability as the governing Ministry, named in Article 13, existing in Norway, and only in their presence shall Norwegian affairs be disposed of by the King. All applications from Norwegian citizens to the King shall first be presented to the governing Ministry in Norway, and supplemented with their opinion, before passed upon. As a rule, except where serious obstacles prevent, no Norwegian affairs shall be disposed of without obtaining the advice of the governing Ministry in Norway. The Minister of State shall move the consideration of public business, and shall be responsible for the due expedition of all resolutions taken. Article 16. The King shall prescribe rules for all public religious and church service, and for all meetings and conventions relating to religious affairs, and he shall take care that the public instructors of religion adhere to the standards prescribed them. Article 17. The King may enact and repeal ordinances relating to commerce, customs, industrial pursuits and public order, not, however, in conflict with the Constitution or the laws of the Storthing, passed pursuant to the provisions of Article 77, 78 and 79 of this Constitution. Such acts of the King shall remain provisionally in force until the next Storthing. Article 18. The King shall, ordinarily, cause the taxes and imposts, levied by the Storthing, to be collected. The Norwegian Treasury shall remain in Norway, and its revenue shall be devoted to the requirements of Norway alone. Article 19. The King shall take care that the estates and regalia of the State be used and managed in the manner prescribed by the Storthing, and for the greatest advantage of the public. Article 20. The King shall have power, in council, to pardon offenders after conviction. The offender shall, however, have the option to accept the pardon of the King or to suffer the punishment adjudged. No pardon or reprieve, except the remission of the death penalty, shall be granted in cases prosecuted by the Odelsthing in the Court of Impeachment. Article 21. The King, after hearing his Ministry in Norway, shall appoint and induct all civil, ecclesiastical and military officials, who shall take an oath of obedience and fealty to the Constitution and the King, or who, if relieved by law from such an oath, shall solemnly declare their fealty to the same. Royal Princes shall hold no civil office.