Sayyed Mohammad Al-Musawi, Sayyed Mohammad al-Musawi is originally from Iraq and heads up the World Ahlul Bayt Islamic League in London. Other than being involved in various humanitarian projects, he frequently responds to... Answered 10 months ago

Every believer is responsible to follow the verdicts of the Marja' of Taqleed whom he follows provided that the (Marja') has enough evidence from leading scholars (Ahlul Khobra) that he is a real Marja' of Taqleed.

This is in the verdict (Fatwa) which is binding only on believers who follow that Marja', but if the Marja' Al A'laa issues a Hokm (Order), then the Order is obligatory on every believer whether he follows him or other Marja'.