(1) For a member employed and participating in the retirement system prior to January 1, 2003, who has elected not to participate in the cash balance benefit, a member's share of the fund arising from the state contributions made in accordance with section 84-1309 shall be known as his or her employer account. Prior to January 1, 1981, as of any January 1 a member's employer account shall be equal to his or her account as of the next preceding January 1, increased by one hundred four percent of any amounts deducted from the member's compensation since the next preceding January 1 in accordance with section 84-1308. As of January 1, 1982, a member's employer account shall be equal to the account as of January 1, 1981, increased by one hundred four percent of the amounts deducted from the member's compensation for the first nine months of the year and one hundred fifty-six percent of the amount so deducted for the final three months of the year in accordance with section 84-1308. As of January 1, 1983, and each year thereafter, the member's employer account shall be equal to the account as of the next preceding January 1 increased by one hundred fifty-six percent of any amounts deducted from the member's compensation since the next preceding January 1 in accordance with section 84-1308. The member's employer account shall be increased by any interest allocated under the provisions of the guaranteed investment contract and any gains on investments and reduced by any losses on investments, any expense charges under the guaranteed investment contract or other investments, and any expense charges incurred in connection with administering the retirement system in excess of those provided for in section 84-1321.01, except that a member who ceased being an employee since the next preceding January 1 may have his or her employer account reduced in accordance with section 84-1321.01. On and after July 1, 1999, the employer account shall be equal to the sum of the assets of the accounts created by the board pursuant to section 84-1311.03.

(2) On and after January 1, 1997, and until July 1, 1999, the state investment officer shall invest the employer account, and, after July 1, 1999, upon maturity, the state investment officer shall invest the employer account funds which have been invested in guaranteed investment contracts prior to January 1, 1997. On and after July 1, 1999, the employer account shall be invested pursuant to section 84-1311.03. The state investment officer shall invest or reinvest the funds in securities and investments the nature of which individuals of prudence, discretion, and intelligence acquire or retain in dealing with the property of another, and if the state investment officer has special skills or is appointed on the basis of representations of special skills or expertise, he or she is under a duty to use such skills.