Okla. Admin. Code § 590:35-7-6
(a) If, due to a mistake of fact, an Employer Contribution has been allocated to an Account in error, the Recordkeeper shall reallocate from such Account to a suspense account as soon as administratively possible but not later than the Plan Year immediately following the Plan Year in which the mistaken Employer Contribution was made:
Added at 15 Ok Reg 1240, eff 1-26-98 (emergency)
Added at 15 Ok Reg 3282, eff 7-13-98