Finance Minister, Minister of Corporate Affairs Arun Jaitley with other Ministers arrives to attend the Parliament Budget Session after the BJP Parliamentary Party Meeting at Parliament Library on March 28, 2017 in New Delhi, India.

India's lower house of parliament on Wednesday passed key legislations, putting Asia's third-largest economy on course to launch a nationwide goods and services tax (GST) from July.

Finance Minister Arun Jaitley aims to roll out the new sales tax from July 1 that will subsume a slew of federal and state levies, transforming a nation of more than 1.2 billion population into a single market.

What Jaitley calls the biggest tax reform since independence in 1947 is expected to boost economic growth by about 0.5 percentage points in its first year of implementation.