the word “prison” means any prison under the control and management of the General Prisons Board and includes any part of such prison set apart for the confinement of any particular class of prisoner;
the word “prisoner” includes persons undergoing preventive detention;
the expression “general prison” means any prison which is neither a convict prison nor a prison set apart for the confinement of persons undergoing preventive detention;
the expression “the Minister” means the Minister for Justice.