closing of register

A2z management services limited is a listed company quoted at Bombay stock exchange limited. the company closed its register of debenture holders in June and august 2016 for 12 and 21 days respectively. the chief financial officer of the company has informed the secretary of the coMpany to consider closing the register in December for another 15 days for some strategic reasons.reffering to the provisions of the companies act,2013,examine the validity of the above action of the coMpany.