Someone asked if she had to wear stockings in Yerushalayim if it was "minhag HaMakom". How so,the only source in the poskim that SHOK is from the knee up and the area below need not be shielded is MB on Sh. A. Or. Ch. 75. All other poskim (Sh. A. HaRav, Chaei Odom, Ch. Ish, Minchas Yitzchok, Shevet Halevi, Sho"t of R. Elyashiv - to name but a few) state in no uncertain terms that stockings are a halachic must. Shouldn’t she wear those regardless ?
The Mishna Berura is not alone-see Shu”t Yabia Omer Yoreh Deah 6,14 and Shu”t Divrei Yatziv Even HaEzer 37. The Mishna Berura’s opinion is of sufficient weight to be relied upon in the absence of a personal or family minhag and in a society where a dress that covers the knees is considered modest.