WORKING AND SAFETY RULES. (A) There shall be no inequitable minimum or maximum amount of work which an Employee may be required to perform during the working day, and there shall be no restriction imposed against the use of any type of machinery, tools or labor saving devices, except as provided in Article I, Paragraph (N), above. At the discretion of Employer, Employees may be changed from one classification to another within the jurisdiction of the Union. During emergencies, any Employee of Employer may be assigned to any work; provided, however, that no Employee’s hourly rate shall be lowered under this provision, and provided further that in the event an Employee is assigned to work calling for a higher rate of pay, he shall receive such higher rate for hours so employed.