It is the intent of the Legislature that, to the extent a governmental entity or entities establishes a trust, that it be operated in compliance with the Internal Revenue Code 26 U.S.C., as amended, in a manner which would allow the trust to maximize investment earnings while minimizing the costs to the governmental entities and their employees. The trusts shall not be subject to any current or future provision of a law, rule, ordinance, or resolution of the state, municipality, city, town, county, agency, or instrumentality thereof which conflicts with this legislative intent or would prevent or unreasonably hinder the accomplishment of the purposes of this chapter. This chapter shall be read as separate and apart from, and not in conflict with or subject to, the provisions of Amendment No. 623 of the Constitution of Alabama of 1901, now appearing as Section 228.01 of the Official Recompilation of the Constitution of Alabama of 1901, as amended.