32 CFR 552.93 - Permit deadline and duration.
(a) Permits will be issued 0700-1900 hours daily and may be obtained no earlier than six months prior to the event date. Permits for authorized activities may be requested and issued on the day of the event, but must be in hand prior to individual or group entry on to the range complex.
(b) Permits for one-time events are valid for the duration of the event. Otherwise, permits are valid for six months and are not renewable. When a permit expires, the holder must reapply as described in this section.
(c) Access hours are thirty minutes after daylight to thirty minutes before dark, except for authorized overnight activities and as outlined in FL Reg 215-1.