The Scottish Premier League club Hearts hope the way will be cleared for them to sign the Uganda international.
The 24-year-old midfielder/defender and the Scottish side agreed terms, providing he gets a work permit.
Obua has played the required percentage of games for his national side, but there are work permit problems because Uganda is outside Fifa’s top-70 ranked countries.
That means Hearts must rely on the appeals procedure and will plead their case at the National Stadium in front of an independent panel of former players and league officials.
Obua, a former South African Player of the Year who was on trial at West Ham recently, would be new Jambos boss Csaba Laszlo’s first signing if the red tape can be overcome.
Obua is currently in Uganda and if he is cleared will fly out on Thursday but will miss the start of the Scottish league on Saturday. Hearts open with a home match against Motherwell.