I'd be interested to know if they asked for the families blessing (for lack of a better term) to hold it there. And more important, if it was given.
imo it wasn't given
6: All participants must stand on the public easement off of the roadway. No participants can extend into any yard further than 4 feet. It is important that all participants follow this rule.
Someone(sorry I con't remember who) on the board called the city to ask about the laws when the vigils were being done and this is almost exactly the rules they told her. I think if they had the family's blessing they would be in the yard.