Celtic have confirmed they will make just 800 away tickets available for their September clash with Rangers at Parkhead in response to their Glasgow rivals cutting the Bhoys' faithful's Ibrox allocation to less than a thousand.
In May, the Gers said would be responding to a huge demand for season tickets by drastically reducing away end numbers.
Celtic fans would normally have received both tiers of the Broomloan Stand in a reciprocal arrangement that saw about 7,000 travelling fans attend derbies at both grounds.
That could now be a thing of the past unless discussions are opened and a compromise is reached, something Celtic said they remain open to.
In a swift response to Rangers' initial decision two months ago Celtic had said: "An unprecedented double treble and historic season for the club has led to a phenomenal level of demand from supporters to be part of Celtic.
"We are happy to reciprocate in terms of ticket allocation, something which will give us the opportunity to meet this huge demand to visit Celtic Park."
Now, they've reiterated that stance, releasing a club statement that read: "Celtic Football Club has confirmed that it will issue approximately 800 tickets to visiting supporters for the fixture against Rangers at Celtic Park on September 2. This mirrors the decision announced recently by Rangers.
"This is not a development we welcome and it is unfortunate that the initial decision came without any form of discussion. The previous arrangements worked well for both sets of supporters as well as contributing to the status of the fixture as a sporting occasion.
"Following the unilateral action by Rangers, we cannot allow our own supporters to be doubly penalised, by having access to the away fixture reduced so dramatically, while not being offered the opportunity to maximise our own support at Celtic Park.
"The rules of the SPFL call for ‘reasonable’ provision to be made for visiting supporters, without being specific on numbers. Within that context, we would welcome further discussions involving the two clubs and the SPFL.
"Celtic’s decision relates, at this stage, to the match on September 2, 2018."