Where a union has no residency requirements included in its collective bargaining agreement, and the municipal code provides that no residency requirements may be imposed on the members of the bargaining unit more restrictive than those already in place, the union has no obligation to bargain over the issue and the interest arbitrator may not impose such a requirement.The 1st District Appellate Court affirmed the decision of Cook County Associate Judge Sanjay T. Tailor.The village of Oak Lawn and the Oak Lawn Professional …