ROC Delhi has put up on MCA website list of Directors disqualified w.e.f 1st Nov 2016 u/s 264(2)(a) of Co Act 2013 due to non filing of Balance Sheet or Annual Return for three continuous Financial Years.
Such disqualification in a co vacates his directorship in other companies also by virtue of Sec 167(1)(a).
Such Directors cannot act in any of these companies on or after that date and if he does so, he shall be liable u/s 167(2) of Act.
Kindly also check if current year 2017 will become 3rd continious year for non filing of Balance Sheet *OR* Annual Return for any of your client co else they will become disqualified in all companies in which they are Directors.
http://www.mca.gov.in/MinistryV2/roc_delhi_164.html