An employer with a paid time off policy that makes available an amount of earned sick leave sufficient to meet the accrual requirements of the Healthy Workplaces Act and that may be used for at minimum the same purposes and under the same terms and conditions as that act is deemed to be in compliance with that act. However, on the effective date of the Healthy Workplaces Act, the sick leave required by that act shall be in addition to any paid time off provided by an employer pursuant to a collective bargaining agreement unless that paid time off provided may be used for the same purposes and under the same terms and conditions as the Healthy Workplaces Act.