Thanks for raising this question - it's not one that we've had before.
Note 3 at the bottom of page 7 of the Appeals Code states:
Academies are all-ability state-funded schools managed by independent sponsors, established under section 482 of the Education Act 1996. The funding agreement between an Academy company and the Secretary of State requires the Academy’s admission arrangements and arrangements for appeals to be in accordance, or consistent with admissions law and the School Admissions Code and School Admission Appeals Code. [my underlining]
Para. 2.20b of the Appeals Code says:
The admission authority must include a summary of the school’s net capacity
However, if you go to:http://www.education.gov.uk/rsgateway/D ... 010-V3.pdf
and look at "Technical Notes - definitions" (about two-thirds of the way down) it says:
net capacity assessments do not apply to academies, nursery schools, special schools or pupil referral units.
The other difference that comes to mind where academies are concerned (and one that is clearly stated in the Appeals Code) is that any complaints about the appeals process are not made to the ombudsman - they have to be made to the Department for Education.