Earlier this week, Mervyn Gibson, the grand chaplain of the Orange Order, said:
We would appeal that all our members show the usual dignity when on parade.
We are out to celebrate something that was actually the birth certificate of Northern Ireland. We want everybody involved to have a good day.
We want those who watch the parade, maybe not sympathetic to the political aspiration of being unionist, to also enjoy the parade and to see the significance that it has for the whole unionist community.
It's not about the Orange Order, the loyal orders even, on Saturday. It's about the whole community celebrating the Ulster Covenant.
He also called for respect for marchers, and said: "Certainly we will be appealing for calm on all sides and respect to be shown to everyone."