Small Aircraft
Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 6.75
Confusion
ATC Issue All Types; Deviation / Discrepancy - Procedural Published Material / Policy
Procedure
The previous controller approved an opposite direction IFR approach to a satellite airport just prior to me getting briefed for the position.  GMU ATCT was advertising Runway 19.  Aircraft X requested and was approved for an opposite direction ILS Runway 1 approach and coordination was effected and complete.  I took over the position; vectoring and clearing Aircraft X for the ILS approach.  Meanwhile arriving from the north IFR to GMU requesting a visual approach to Runway 19 was Aircraft Y. I assigned Aircraft Y a westbound heading and to maintain 3;000.  I then switched Aircraft X to GMU ATCT.  Shortly after Aircraft X dropped off the radar on short final; I verified Aircraft Y had the airport in sight and cleared him for the visual approach to Runway 19.  It was later brought to my attention that Aircraft Y needed to be at least 10 miles from the airport prior to being cleared visual approach and Aircraft X on the ground.  Safety and separation was not an issue as Aircraft Y was at least 5 miles from the airport when Aircraft X touched down.In this day and age; opposite direction approaches provide no significant benefit to the operation under normal circumstances especially with all of the required coordination and separation.  Therefore; I will not be authorizing opposite direction approaches anymore.
A GSP TRACON Controller reports of a deviation to the Opposite Direction Operation because the second aircraft was not within the standards for the operation to occur.