Okla. Admin. Code § 230:30-9-1
Absentee ballot applications shall be entered in MESA on the day received. In the event the volume of absentee applications being received makes it impossible or impractical to enter all such applications on the day received, applications shall be entered within 48 hours of receipt. In all cases except for nursing home and emergency incapacitated voters, ballots shall be mailed or provided electronically, as provided in 230:30-9-5.1 and 230:30-9-5.2, to the voter the same day the applications are entered in MESA if absentee ballots are available at the time the application is received. If absentee ballots have not yet been received when an application is received and entered, the ballots shall be mailed or provided electronically as soon as possible after the absentee ballots are received from the printer.
Okla. Admin. Code § 230:30-9-1