The Ceremony of Receiving the new building

The ceremony of receiving the new "The National Office of Buddhism" Building and other ceremonies were arranged in Buddha Monthon, Nakhon Pathom province.

When the monks go for the offering rounds, can they wear a pair of sandals?

I would like to ask about when the monks go for the offering rounds; can they wear a pair of sandals? For nowadays some areas are not suited to walk bare footed.