If you are a member in good standing of a dispatching union, you are considered actively seeking work by remaining in contact with your union and available for dispatch to jobs they offer you.
If you are a federal employee, temporarily unemployed due to a government shut down and expect to return to work for your employer when the shutdown ends, you may not have to seek work with other employers. You are considered actively seeking work if you remain in contact with your employer and are capable of accepting and reporting for any suitable work with your employer.