The process will be developed at the plenary session of the legislature, after being endorsed by 91 assembly members.
The Oversight Committee recommended last week to file the case for lack of support.
Pachakutik Legislator Darwin Pereira accused Arregui of several charges, including a lack of control of activities in the financial system, computer fraud, credit renegotiation, and failure to prevent the operation of illegal money collectors.
jg/iff/jha/scm