Joint Membership in housing Co-ooerative in west bengal

We are residing in a co-operative housing Scty Kolkata since last 39 yrs. I have a letter from the DRCS ( April, 1979) directing the housing scty to include my wife's name as a Jt.member and include her name in the share certificate. All these years the society did not take any action nor did we. Now, in the year 2016 the Membership register and nomination register were re-written as per the order/direction of the Auditor since it had worn out. Now, my daughter was made the nominee and my wife was made the Jt. Member as per the DRCS letter and accordingly her name was included in the Membership register and share certificate . Recently in our last AGM (24-6-'18)my wife was not allowed to speak citing that she is not a Jt. Member and having a name in the Share certificate does not make her a Jt. Member. The Secretary had cancelled her Jt membership on his own without any Board meeting or discussion with other members. My question is - can a person hold a share certificate if he/she is not a member /Jt. Member?