Joint top scorers James Constable, of Oxford, and York's Richard Brodie both scored hat-tricks against Chester, while Tubbs only scored one.
In the league table, strugglers Gateshead, twice beaten by Chester, are the main beneficiaries.
At the top end, Stevenage are worst affected, having also beaten Chester twice, thereby also losing six points - in comparison to their main promotion rivals Oxford and York City, who had played doomed City only once.
Luton Town also benefit, having twice failed to beat Chester this season.
The second of this season's two 0-0 draws between the two clubs proved to be City's last point back on 5 December.
The Conference had recommended that cash-strapped City should be expelled from the league. And, at a vote at Rushden & Diamonds' Nene Park on 26 February, they duly achieved the required statutory agreement of 75% of the Conference's member clubs.
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