He led his new-look team to a 1-0 first leg win in the Europa League first qualifying round against Luxembourg side Progres Niederkorn on Thursday.
He has issued every member of the first team squad with a document about objectives, style of play and rules of conduct for the season – which includes a ban on wearing green boots.
When asked if the decision is because it clashes with the colour of grass, Caixinha answered: “It is the colour of Celtic. From today, no one will wear boots of that colour.
‘The slogan: ‘We Are The People’ will be stamped on the walls for both our players and our opponents to feel the strength of Rangers.”