But Judge Blackett said he was satisfied a retrial was in the public interest.
Cmdr Blackett was given written submissions from members of news organisations, challenging the interim ban.
The men will have anonymity until their court martial finishes, Judge Blackett has ruled.
Jerry Blackett, the chamber's chief executive, said local firms had suffered delays and rising costs.
Their hearing will be in Dublin on Monday, 6 November, to be chaired by Jeff Blackett (England).
Leeds led 18-10 at half-time with tries from Lee Blackett and Jonny Hepworth.
The Appeal Committee consisted of Jeff Blackett (chairman, England), former England prop Jeff Probyn, and Dr Roger Evans from Wales.
Mr Blackett reckons it takes about 10 to 15 years for such a brand gaffe to be forgiven and forgotten.
Rugby Football Union chief disciplinary officer Judge Jeff Blackett had equated the offence to abuse of a match official, a position Armitage rejected.
"It brought discredit on himself and his club and failed to uphold one of the core values of the game - respect, " said Blackett last month.
Chief executive of Birmingham Chamber of Commerce Group Jerry Blackett said the impact on the economy would be "more than just good news for Jaguar Land Rover".
"We were disappointed he didn't understand the seriousness of what occurred and his behaviour was clearly unacceptable in provoking a reaction from the Leicester supporters, " said Blackett.
"Schalk reacted to something from the crowd and his signal was momentary, without any aggression, and there was no evidence that he used any abusive language, " Blackett added.
But their willingness to run with the ball was punished when Lee Blackett intercepted a loose pass on 70 minutes and sent Goodridge in for a try, converted by Thomas.
Venter received a 10-week ban for his gesture while RFU disciplinary chief Judge Jeff Blackett activated the four-week suspended penalty he was given for criticism of referees earlier in the season.
Paul follows fellow academy product Kearnan Myall to agree a new deal with the West Yorkshire club this summer, along with the likes of Mike MacDonald, Jon Goodridge, Rob Rawlinson and Lee Blackett.
Armitage's ban had been reduced from 12 weeks to eight on account of what Blackett described as "his remorse, his letter of apology to the doping control officer and his relatively good record".
Judge Advocate Jeff Blackett said there was no abuse of process relating to the content of emails apparently leaked by a Ministry of Defence source, which were referred to for the first time at the hearing.
An anonymity order, granted last year to protect the identities of the five accused by the judge advocate general Cmdr Jeff Blackett, will remain "in full force in respect of all five" marines until further instruction.
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