In a nutshell-- whether or not it is appropriate-- nay, LEGAL-- for a school to define what an appropriate 504 plan can be in the case of a particular child. That is, can they actually say; "we're not including X, Y, or Z because that's in school policy and it'll make your 504 plan too long if we include all of that" or even "you don't need to know how we plan to address it"?
That is, do you HAVE to take what the school "offers" even if you don't believe it to be adequate? What if your allergist approves it? What if they don't TELL you whether or not they plan to do something that you and your allergist agree is essential-- or won't put it in writing just who or how?
More to the point, it's a case in which the federal court system is being used to pursue remedy for a 504 process gone awry.