The employer and the union signed a pay equity plan in 2006 that tied the wages of female-dominated library job classes to male-dominated job classes in a separate municipal bargaining unit.
Subsequent interest arbitration awards for the municipal unit created a wage gap between the library employees and their comparators.
The employer argued that the pay equity plan capped retroactive adjustments and that any wage gap was permitted under the 'bargaining strength' exception in subsection 8(2) of the Pay Equity Act.
The Pay Equity Hearings Tribunal held that the pay equity plan did not cap adjustments and that the employer failed to prove the wage gap resulted from differences in bargaining strength.
The employer was ordered to pay the corresponding percentage wage increases to the female job classes.