G20 report chastises police. But who's responsible?

The Office of the Independent Police Review Director (OIPRD) has denounced the tactics that police and their superiors used during the G20 gathering in Toronto. The OIPRD has released a report that, hopefully, will be less easy to ignore than the past reports. See the Star's initial take.

I'm sure we'll be hearing more about this, but the thing that strikes me is the lack of accountability. No one seems to know (or name) who made the offending orders to leave the violent protesters (the "black bloc") alone and to trap and arrest the peaceful protesters the next day.

While a small group was breaking store windows and destroying police cars, the Major Incident Command Centre held a meeting about the havoc:

"At a point where there was silence, I asked the question, ‘Why are we not arresting these people?’" [incident commander Mark] Fenton is quoted as saying. "The Chief [Bill Blair] responded by looking at me and saying, ‘That is a very good question, Mark.’" 

Fenton said he also asked another incident commander how the situation had spiralled out of control. 

"Superintendent Ferguson responded by shaking his head and saying words to the effect of, ‘I tried, but I could not get the public order to move’ … I asked them to move and I was told that they couldn’t.’"

To whom did superintendent Ferguson make his request for a "public order"? Why was the request denied?

Then:

During the Queen and Spadina kettling, commanders on the ground made two requests to the major command centre at police headquarters: to use the LRAD—colloquially referred to as a “sound cannon”—to communicate with the crowd, and for an exit route for people to leave.  

"Both requests were denied," the [OIPRD] report said.

Again, who denied the orders and why?