In this chapter, the following terms have the meaning indicated. Terms Defined. “Competent authority” means: The boiler manufacturer; or If the boiler manufacturer is unavailable or defers to a jurisdictional authority: A person designated by the Commissioner of Labor and Industry as a Deputy Boiler Inspector or a Special Boiler Inspector; or A professional engineer who has experience in the design, operation, and maintenance and repair of boilers. “High level” means the level above normal considered unsafe for the operation of the boiler by a competent authority. “High pressure” means the pressure above normal considered unsafe for the operation of the boiler by a competent authority. “High temperature” means the temperature above normal considered unsafe for the operation of the boiler by a competent authority. “Low level” means the level below normal considered unsafe for the operation of the boiler by a competent authority. “Low pressure” means the pressure below normal considered unsafe for the operation of the boiler by a competent authority. “Low temperature” means the temperature below normal considered unsafe for the operation of the boiler by a competent authority. “Normal level” means the level considered safe for the operation of the boiler by a competent authority. “Normal pressure” means the pressure considered safe for the operation of the boiler by a competent authority. “Normal temperature” means the temperature considered safe for the operation of the boiler by a competent authority.