Okla. Admin. Code § 230:15-9-34
In the event that a rejection notice mailed to an applicant is returned undelivered by the post office, the Secretary of the County Election Board shall cause the following procedure to be observed.
Added at 12 Ok Reg 2225, eff 7-1-95
Amended at 14 Ok Reg 2624, eff 7-1-97
Amended at 28 Ok Reg 1132, eff 7-1-11