Welder and Burner Assistants. If fire hazards or other extraordinary conditions exist, welders or burners employed in such locations shall have an assistant for each welder or burner so employed. When a xxxxxxxxx is welding or burning, an assistant will be assigned to perform duties pertaining to the welding and burning as required or may be gainfully employed on other work in the immediate vicinity. When the Union feels that conditions on any job justify an additional assistant or assistants, then one (1) representative appointed by xxx Xxxxxxxxxx' District Council and one (1) by the Southern Illinois Builders Association shall immediately investigate and resolve the complaint. There shall be no work stoppage until this two (2) man committee has had the opportunity to arrive at a decision which shall be binding.