Glentoran look set to seek the right to arbitration following their recent expulsion from the Irish Cup over the Joe Crowe eligibility affair.
The Big Two giants had a Tuesday deadline to make a decision on their next step after the Irish FA dismissed their latest appeal on Friday.
Glens boss Mick McDermott said at the weekend that the Mersey Street club would “never go quietly into the night” and was “up for any fight”.