ISBA said yesterday (Tuesday) that lifting the ban would not have been in the interests of commercial advertisers because brands could have been tainted by the controversy that inevitably surrounds election campaigns.
ISBA had also warned that lifting the ban would have driven up airtime costs.
Among the recommendations are an overhaul of the system of allocating party political broadcasts (PPBs), and that all broadcasters that carry PPBs should be overseen by a system under the authority of Ofcom, the new industry regulator.
However, the Commission recommended that greater flexibility should be provided over the length of broadcasts.
The Commission's report has been submitted to culture secretary Tessa Jowell for scrutiny, although it has no power to implement the recommendations itself.