Sec. 2.03. PURPOSE. It is the express purpose of this Act to have no duplication of benefits provided by the police retirement system and the retirement system for other employees of the city for a common period of service to the city. Any change in employment status which results in transferring membership between the police retirement system and the retirement system for other employees of the city shall be handled in a policy determined to be satisfactory by the police retirement board and by the board for the retirement system for other employees of the city. Such policy may include the transfer of member service and appropriate transfer of Fund No. 1 and Fund No. 2 assets as determined by the retirement boards.