But when Officers of the Royal Naval Artillery Volunteers are employed on shore on joint service with Her Majesty's Land Forces, their relative rank shall carry with it all precedence and advantages attaching to the rank with which it corresponds, except command as aforesaid. [Sidenote: To be under command of Senior Naval Officer whenever assembled.] 19. All Royal Naval Artillery Volunteers, when assembled for drill or inspection, or voluntarily doing any naval duty either afloat or on shore, will be under the command of the Commander-in-Chief, or Senior Naval Officer of the district within which such Royal Naval Artillery Volunteers are undergoing drill or inspection, or doing duty. [Sidenote: Not to assume Naval Command unless specially ordered.] 20. The Officers and Petty Officers of the Royal Naval Artillery Volunteers shall command each other, and the Gunners and Buglers of the Force, agreeably to their respective ranks, in all matters relating to their duties; but none of them are ever to assume any naval command or authority whatsoever, unless ordered to do so by their Superior Naval Officers, and they are to be, in all matters whatsoever, under the command of the Captain or Commanding Officer of the ship in which they may be, and of the Officer of the Watch for the time being whatsoever his rank may be. HONOURS AND DECORATIONS. [Sidenote: Guards.] 21. A Guard of Honour may be provided as a matter of course for a member of the Royal Family, or the Admiralty, on arrival in the neighbourhood of the headquarters of a Brigade; but in no other case will any body of the Naval Artillery Volunteers take part in any public procession or ceremony, or form a Guard of Honour, without the special authority of the Admiralty or the Senior Naval Officer of the district. [Sidenote: Decorations.] 22. The only decorations that may be worn on the left breast are those given by the Queen or by a Foreign Sovereign. In the last case mentioned, Her Majesty's permission to accept and wear the decoration must have been granted. The medal of the Royal Humane Society may be worn. OFFICERS. [Sidenote: Appointment.] 23. All Officers of the Royal Naval Artillery Volunteers will be commissioned by the Admiralty. [Sidenote: Commanding Officers to recommend.] 24. The Commanding Officers of Brigades will recommend for the consideration of the Admiralty, names of persons for the appointments and promotion of Officers in their Brigades. In order to enable the Admiralty to judge the qualifications of the persons recommended, the Commanding Officer will forward, with his recommendation, a statement giving the name, age, residence, place of education, and occupation or profession of the Candidate, as well as a Medical Officer's Certificate, stating that the Candidate is in good health and fit to perform the duties of an Officer. [Sidenote: Holding a commission in other Forces.]