Employees included in this Bargaining Unit shall not perform work of a routine or repetitive nature ordinarily assigned to other employees, unless current practice dictates otherwise, and employees not in this Bargaining Unit shall not perform work of a routine or repetitive nature ordinarily assigned to employees in this Bargaining Unit. This Section shall not apply when the Mayor officially declares that a state of emergency exists pursuant to Section 2105.17 No Strike, No Lock Out, Safe Conduct.