Is there any bar on allowing outsiders in Cabinet meetings? | Explained

On July 4, del­eag­a­tions of the DMK, the AIADMK and the BJP met Gov­ernor Rajendra Vish­wanath Arlekar and sub­mit­ted sep­ar­ate memor­anda urging him to ini­ti­ate legal action against the par­ti­cip­a­tion of “two private indi­vidu­als” in a recently held Cab­inet meeting