The index is operated by Asia Index -- an equal venture between S&P Dow Jones Indices LLC and BSE.
Currently, there is no minimum threshold in terms of market capitalisation, annualised traded value and turnover ratio for the inclusion of scrips in S&P BSE infrastructure index.
The changes would be applicable in September, when the rebalancing of the index takes place, according to a circular posted on the BSE's website.
As per the new methodology, current index constituents with a market capitalisation of at least Rs 80 crore.
Besides, companies with a turnover ratio of 8 per cent will be eligible for the inclusion in the index, the circular noted.
Generally, turnover ratio refers to the value of shares traded divided by their respective market capitalisation.