SB13 - AN ACT TO AMEND SUBSECTION K OF SECTION 1 OF ACT 177 OF 1957, AS AMENDED [ARK. STAT. 12-2501], AND SUBSECTION 8 OF SECTION 2 OF ACT 793 OF 1977, AS AMENDED [ARK. STAT. 12-3302(2.08)], CHANGING THE DEFINITION OF AVERAGE COMPENSATION AND FINAL AVERAGE PAY F