Pensions and Retirement Benefits - As introduced, requires retirement credit established for a period of disability for a commissioned member of the department of safety or agent of the Tennessee bureau of investigation to be at no cost to that member; authorizes political subdivisions that pass a resolution to establish retirement credit for its employees to allow a police officer's credit for a period of disability to be at no cost to the officer. - Amends TCA Title 8, Chapter 34, Part 6.