Section 6B. The commissioner shall appoint a duly qualified and licensed medical doctor as state house physician to serve under the commissioner and at its pleasure. He shall be provided with suitable quarters in the state house for the sole purpose of rendering necessary first aid and emergency medical treatment in and about the state house in accordance with such rules and regulations as the commissioner may from time to time prescribe. He shall receive such salary as may be established by the commissioner and may employ, subject to the approval of the commissioner, such nursing and other assistants as he deems necessary.