Apparently, it's mandatory for any *A member to have a certain percantage of it's fleet painted in the Alliance Livery. Don't know the exact number though and I think the airline has to have some amount of aircraft before they have to follow this rule- say an airline with only one aircraft won't have to paint it in the star alliance livery (which makes sense- then, it'd be 100% of the fleet which wouldn't be fair :lol: ).
I've never seen such a dull livery in my life- I wish they could improve it a little, but looks like that won't happen.