The Football League has closed the loophole that allowed Leeds to go into administration without suffering a 10-point deduction for next season.
From next season any club going into administration after the fourth Thursday in March will have their 10-point deduction suspended.
If the club is relegated the points will be deducted from their tally at the start of next season.
If the club stays up the 10 points will be taken off their final total.
I am delighted that clubs have backed their board so strongly on this issue
Football League chairman Lord Mawhinney
The club would then go down if the 10-point deduction subsequently resulted in it slipping into a relegation place.
The rule change was passed unanimously by the 72 chairmen of the Football League at their annual general meeting in Portugal.
Football League chairman Lord Mawhinney said: "I am delighted that clubs have backed their board so strongly on this issue.
"The changes we have made today enable the League's 'Sporting Sanctions' regulations to remain true to their original aim.
Leeds went into administration on 4 May - and the automatic 10-point deduction saw them relegated to League One.
However, the Yorkshire club were almost certain to be relegated anyway and in entering administration avoided starting the following season minus 10 points.
Meanwhile, Boston United went into a Company Voluntary Agreement on 5 May, during their last game of the season - when they were losing at Wrexham and set to be relegated from League Two in any event.