Based on the provided legal document, here are the key points regarding the case Bharat Petroleum Corporation vs. Mumbai Shramik Sangha:

• The matter was referred to a Constitution Bench on 13th January, 1998, because two learned judges doubted the correctness of the scope attributed to Section 10 of the Contract Labour (Regulation and Abolition) Act, 1970 in the previous Gammon (India) Ltd. v. Union of India judgment. (!)
• The Court held that a decision of a Constitution Bench binds a Bench of two learned judges and judicial discipline obliges them to follow it, regardless of their doubts about its correctness. (!)
• At the most, the doubting judges could have ordered the matter to be heard by a Bench of three learned judges. (!)
• Accordingly, the matter was directed to be heard and decided by a Bench of two learned judges. (!)