I'm sorry, but without the attached circular you mentioned, it's challenging to provide an accurate response. However, the Employees' State Insurance Corporation (ESIC) typically issues circulars to update or clarify certain aspects of their regulations. In this case, it appears to be related to the 'daily benefit rate limit for commutation of Permanent Disablement Benefit (PDB)' under Regulation 76-B of ESI Regulations.
If the circular is about an enhancement of the daily benefit rate limit, it may mean that the maximum daily amount that a beneficiary can receive for PDB has been increased. It's important to read the circular carefully to understand the precise changes, including who it applies to, when it takes effect, and how it might affect existing beneficiaries.
For more details, you may also want to consult the ESIC's official website
http://www.esic.nic.in/ or get in touch with local ESIC officials in Malappuram. They can provide specific guidance based on your situation and the contents of the circular.