Birmingham City Council chief executive Lin Homer has promised to look at ways of tightening postal voting procedures in response to the Aston and Bordesley Green findings.
But Mrs Homer admitted the Government's reluctance to heed warnings about the ease with which fraud could be committed meant substantial changes would not be in place in time for the General Election.
Mrs Homer said she was pleased that Richard Mawrey QC, the Election Commissioner, accepted that conduct by council elections officials was not grounds to void the Aston and Bordesley Green elections.
There was no suggestion that staff acted other than with "honesty and integrity" and did their best best to prepare fully for the 2004 elections.
Mrs Homer added: "We must accept that the judge is identifying areas where circumstances led us to breach elements of the election rules.
" Whilst the judge accepts these did not affect the result of the election we must now consider what we can do to tighten up procedures for the future."
She added election staff and volunteers faced a "unique set of challenges" as the European and local elections were held on the same day.