Normal operating hours are expected to resume on Saturday.
Information specific to Oklahoma businesses can be obtained from the Oklahoma Small Business Development Center, the Oklahoma Secretary of State (for business registration forms), the Oklahoma Tax Commission (for business tax forms), and the Oklahoma District Office for the Small Business Administration. The Oklahoma Department of Commerce also has state information on their site under Business services. If you are starting a business in Tulsa, be sure to check out the One-Stop Permit and Licensing Center.
Source: TCCL Government Documents web page.