(a) The boards of trustees or directors, by whatever name known, of any two or more retirement systems created by general law, pursuant to the mutual consent of such boards, may pool their trust funds for the purposes of joint investment. The board of trustees or directors, by whatever name known, of any two or more local retirement systems funded by a single political subdivision may likewise pool their trust funds for the purposes of joint investment. When such pooling occurs, the board of trustees of the managing retirement system shall account for the pooled trust funds in accordance with generally accepted principles of accounting, in order to maintain separate accountability of such funds while under its management.

(b) The pooled trust funds may be invested in accordance with Chapter 2 of this title, relating to the Employees' Retirement System of Georgia, notwithstanding any other provisions of law to the contrary.

(c) Nothing in this Code section shall establish a legal provision for combining the Employees' Retirement System of Georgia with the Teachers Retirement System of Georgia.