Section 31. Whoever delivers or procures to be delivered, or has in his possession with intent to deliver, to an inmate confined in any penal institution, or whoever deposits or conceals in or about the institution, or the dependencies thereof, or upon any land appurtenant thereto, or in any boat or vehicle going into the premises belonging to the institution, any article, with intent that an inmate shall obtain or receive it, and whoever receives from an inmate any article with intent to convey it out of the institution, contrary to the rules and regulations thereof, and without the knowledge and permission of the commissioner of correction or of the superintendent, keeper, sheriff or other officer in charge thereof shall be punished by a fine of not more than five hundred dollars or by imprisonment in the state prison for not more than three years or in jail for not more than two and one half years.
Any inmate of a correctional institution who, upon returning from a furlough or a work program, brings or attempts to bring into said institution an illegal drug, gun, knife or other similar weapon as defined in section ten of chapter two hundred and sixty-nine of the General Laws, shall be punished by an additional sentence of not less than seven nor more than ten years in state prison.