Bangladesh Bank on Tuesday asked banks not to open any new letter of credit for import of crude salt as the import of the item crossed the government-set limit. The office of chief controller of import and export in a letter on Sunday informed the central bank that the government had issued a public notice to allow import of 1 lakh tonnes of crude oil and different businesses establishments imported more than the government-set limit. After getting the letter, BB in a circular on Tuesday asked banks not to open new LC for importing crude salt.