We've decided to grieve the issue mentioned in my original post. The grievance is regarding a benefit that is offered on an annual basis. The language is as follows: 'Employees requesting to drop their hours of work, must do so in writing to their respective manager prior to January 31st of each year.' The employer is claiming that the language is ambiguous, and since it doesn't state anywhere that it is a benefit open to all employees, they are only allowing one employee per year to reduce their hours. Does there have to be a disclaimer on every benefit mentioned in a collective that states, by the way, this benefit is open to all employees? Also, the employer is claiming past practice regarding this issue because last year a denied request by an employee for reduced hours went uncontested by the union. Is one denial enough for the employer to claim past practice, with a year having past since the first occurrence? The grievance now is for the second denial this past Jan 31st.