He said in a letter to Central Bank governor Nivard Cabraal that was released to the media that he will initiate legal action if the Central Bank fails to adopt such a code.
Kotelawala said governance codes proposed by Cabraal for commercial banks and finance companies are aimed at targeting a few individuals.
Kotelawala last month demanded a billion rupees in damages from Cabraal for trying to introduce corporate governance rules that would effectively remove him from a bank and finance companies in his Ceylinco group.
He also threatened to initiate legal action against Cabraal to remove him as central bank governor if he persists with the implementation of the proposed corporate governance codes for licensed commercial banks and registered finance companies.
In his latest letter to Cabraal, Kotelawala said he found it "incomprehensible and shocking that the regulator of commercial banks is attempting to regulate the management of purely licensed private commercial banks and registered