21. Except in such cases and under such conditions as may be prescribed, no person shall, without the previous permission of the Institution, use-(a) any name which so nearly resembles the name of the Institution as to deceive or likely to deceive the public or which contains expressions “Bangladesh Standard” or “Bangladesh Standard Specification” or any abbreviation of such expressions; or(b) any mark or trade mark in relation to any article or process containing the expressions “Bangladesh Standard” or “Bangladesh Standard Specification” or any abbreviation of such expressions.