Dear Sujatha,
You have not stated from which date you are already on maternity leave.
The Amendment Bill was introduced on 08th Aug 2016. However, in the Amendment Bill it is clearly mentioned "It shall be come into force on such date as the Central Govt. may, by notification in the official Gazette, appoint." The formal Gazette yet to be issued.
Generally the law applies as mentioned in the notification. Since you are already availing the benefit, as per my opinion you are entitled only as per previous notification's entitlements.
Here one more point is, if you are covered under ESI, than same will be paid by ESI Office only. Your employed is not bound (legally) to pay anything agst Maternity Leave.
If you are not covered under ESI, than only you are eligible to get benefit from your employer. Ms Sweta has explained how to get benefit from ESI (she faced lot of problems in getting the benefits, so she has shared her real experience).