457(b) assets are not subject to an early withdrawal penalty. – Direct deposit is available.If you began working at the CTA after January 17, 2008, you must be at least 64 years old with at least 25 years of service to receive an unreduced pension. General Information. A CTPF retiree may decide to return to work as a teacher, but there are some rules to be aware of to avoid a pension cancellation. Can I purchase service time to attain retirement eligibility? No, you cannot purchase time that you did not actually work. Employees enrolled in the Traditional Plan who first become participants with SURS or another. Avoid Violating Working After Retirement Rules. As described later, they may be combined if both criteria are met.