Any officer or member of such police department or fire department, who leaves such department and serves in the uniformed services of the United States shall be credited by the respective board of trustees, with time or any part thereof so served, in computing such officer’s or member’s retirement time for pension purposes, as required by federal law, including, but not limited to, when applicable, the uniformed services employment and reemployment rights act of 1994, as in effect on July 1, 2008.