Applicability of ind as

Pls refer to the para 4 of notification for IndAS applicability which reads as follows - 

4. Obligation to comply with Indian Accounting Standards (Ind AS). – 
(1) The Companies and their auditors shall comply with the Indian Accounting Standards (Ind AS) specified in Annexure to these rules in preparation of their financial statements and audit respectively, in the following manner, namely:-

(i)    any company may comply with the Indian Accounting Standards (Ind AS) for financial statements for accounting periods beginning on or after 1 st April, 2015, with the comparatives for the periods ending on 31st March, 2015, or thereafter;

(ii)    the following companies shall comply with the Indian Accounting Standards (Ind AS) for the accounting periods beginning on or after 1st April, 2016, with the comparatives for the periods ending on 31st March, 2016, or thereafter, namely:-

(a)    companies whose equity or debt securities are listed or are in the process of being listed on any stock exchange in India or outside India and having net worth of rupees five hundred crore or more;

(b)   companies other than those covered by sub-clause (a) of clause (ii) of subrule (1) and having net worth of rupees five hundred crore or more;

(c)    holding, subsidiary, joint venture or associate companies of companies covered by sub-clause (a) of clause (ii) of sub- rule (1) and sub-clause (b) of clause (ii) of sub- rule (1) as the case may be; and

As per above, Holding co. of a co. on which IndAS is applicable is also required to adopt IndAS.