"The special session of the West Bengal assembly was called to change the name of the state. Name change is a much bigger issue for the state than the GST," the source said.
The assembly session ended yesterday after passing a resolution for changing the name of the state to 'Bengal' in English and 'Bangla' in Bengali.
The source said while some members wanted GST to be included in the agenda of the two-day session but there wasn't enough time.
GST, he said, is an important legislation and "the assembly cannot pass it without discussion."
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The constitutional amendment needs ratification by half of 29 states and two union territories for GST to become reality. So far 13 states have approved the legislation passed by the Parliament earlier this month and West Bengal delaying or deferring a ratification will not derail it.
Trinamool Congress has been a vociferous supporter of GST and so West Bengal assembly not ratifying the constitutional amendment had raised eyebrows.
GST has drawn support across party lines. While BJP-ruled Assam was the first state to ratify the bill, JD-U's Nitish Kumar-led Bihar was the first non-BJP-ruled state to give its assent. Himachal Pradesh was the first Congress-ruled state to do so. Aam Aadmi Party-led Delhi has also ratified the bill.
Telangana and Mizoram approved the legislation today. The other states that had previously done that include Jharkhand, Chhattisgarh, Gujarat, Madhya Pradesh, Nagaland, Mahrashtra and Haryana.
Arunachal Pradesh and Andhra Pradesh are likely to ratify the law in September while Uttar Pradesh and Rajasthan are likely to call assembly session soon.