The final decision was due at the end of September, but it has now been delayed until the end of this week at the earliest.
The final sign-off on the ruling has been left to the incoming chief executive, John Fingleton, who joined the organisation last week.
The Periodical Publishers Association has re-presented the magazine industry's cause with a plea to the new OFT heads to reconsider the draft opinion.
The industry believes that the draft opinion, which will introduce competition into magazine distribution, is flawed. By giving it the rubber stamp, the PPA argues that the OFT could threaten hundreds of small newsagents.
The PPA's chief executive, Ian Locks, said: "We continue to await the OFT's opinion hoping that our representations will have helped their understanding of the intricate nature of print distribution."