BSP today said it will announce its stand on GST Constitution Amendment Bill once the legislation comes to the Rajya Sabha. Talking to reporters outside Parliament, Party Chief Mayawati expressed doubts whether the bill will come up for discussion or not in the current session because of the on-going logjam between opposition and the government, though it is listed in today's business.<br/><br/>She also took a dig at Samajwadi Party Chief Mulayam Singh Yadav over his remarks that his party will not support the Congress if it continues to agitate in Parliament. Ms. Mayawati said SP Chief is unpredictable and keeps on changing his stand.