As per sec 139(2) of co act-13 listed co & "other class of co" shall not appoint or reappoint-
i An individual as auditor for more than one term of five years,
ii An audit firm as an auditor for more than two terms of five consecutive years
"other class of co" means- All unlisted co having paid up share cap 10 cr or more
All private co having having paid up cap 20 cr or more
All co having public borrowing or deposit 50 cr or more.
Every co existing on or before the commencement of sec139(2) of the act which is required to comply with the said provision shall comply with the requirements of this subsection within three year from the date of commencement of this provision.