Assuming ALL of the required client documents are provided promptly at the start of the project, the estimated processing time at the State Utility Commissions are as the following chart. Please remember that these are estimated approval time frames. The information below is subject to change without notice. Contact ISG staff for any changes. The estimated processing time at the State Utility Commissions are as the following chart. Please remember that these are estimated approval time frames. In addition, some states PUC's don't require filings but ISG-Telecom feels the importance to do so anyway especially so the tariff can be held out to the public. The information below is subject to change without notice. Contact ISG staff for any changes.