This was my followup after @gavreilly.com nice summary. Yes I read the parades commission legislation and the original decision. (Second recent decision not available yet). But I have questions on both the revised decision and subsequent High Court in NI decisions given the original legislation.
Thats interesting given what the legislation says (first two images). Reading the original determination (image 3) it takes a lot of things into account including the police. Also interesting the application for the original parade was done under the European Convention on Human Rights