Any state or local public body deferred compensation plan in existence on the effective date of the Deferred Compensation Act shall not be affected and may be made available to employees and other persons of the state agency or local public body which had adopted said deferred compensation plan on the same basis as on the effective date of the Deferred Compensation Act. Funds of existing plans may be invested in all or any combination of the investments set forth in Subsection B of Section 10-7A-5 N.M. Stat. Ann..