Away supporters will be banned from every match between Celtic and Rangers in SPFL competitions for the rest of the season.
The agreement means the forthcoming Premier Sports Cup quarter-final at Ibrox on 13 September and the Premiership meeting at Celtic Park on 20 September will both be played in front of home supporters only.
It will also apply to any further Premiership or League Cup meetings between the Glasgow rivals during the 2026/27 campaign.
The decision follows an independent review into the serious disorder at the Scottish Cup quarter-final between the clubs at Ibrox on 8 March.
Celtic won the tie 4-2 on penalties following a goalless draw, but the match was overshadowed by supporters invading the pitch and clashes between rival groups.
Fireworks and other objects were thrown as police officers and stewards attempted to keep the two sets of fans apart. Dozens of arrests have subsequently been made.
The independent review, led by Mark Blackbourne, concluded that crushing and potentially life-threatening violence had been narrowly avoided.
Celtic and Rangers had previously agreed that visiting supporters would receive tickets equivalent to five per cent of the available capacity at Ibrox and Celtic Park.
However, Rangers reconsidered the arrangement following the publication of the review and proposed giving Celtic a reduced allocation of 300 tickets for the Premier Sports Cup tie.
Celtic rejected the offer and asked the SPFL to rule on the allocation.
Following discussions involving the league, both clubs and Police Scotland, it has now been agreed that no visiting supporters will be admitted to Old Firm fixtures in SPFL competitions for the remainder of the campaign.
The SPFL described the move as a temporary arrangement intended to give the clubs and authorities sufficient time to consider the review’s recommendations and improve the planning of future fixtures.
It said safety and security would remain the priority while work continued to find a longer-term solution.
The governing body added that the decision could be reviewed if circumstances change materially during the season. Arrangements for matches in the 2027/28 campaign will be considered in advance of next season.
The restriction does not apply to the Scottish Cup, which is operated by the Scottish FA rather than the SPFL.
However, both clubs have already been ordered to play their next home Scottish Cup ties behind closed doors as punishment for the disorder in March.
Celtic and Rangers must also each pay £100,000 to the visiting club affected by those stadium closures to compensate for lost ticket income.
A further full stadium closure has been suspended and could be imposed if either club is involved in more crowd trouble at a Scottish Cup fixture before the end of the 2027/28 season.