As per my opinion and what i had read in my IPCC exams,
Sec 224 1B of The Companies Act deals with the celling numbers of audit assignment an auditor can hold any time during a year. Accordingly an auditor can hold maximum 20 audit assignment out of which not more than 10 companies have a paidup capital of Rs. 25Lacs.
As per your your question what sec 224 1B states that an branch audit shall not be included in counting the audit assignment .
But accoringly an notification issued by ICAI, the max. limit of celling no. of audit assignment are increased from 20 to 30, and while counting the limit of 30 assignment audit of independent branch is to be counted.
Now what an independent branch means???
if an auditor is having audit of branch without HO then it is said to be independent branch. And although the auditor is having the audit of 10 branches of a same company without its HO then also it is to be counted as an single audit assignment
So, overall its means whether an auditor is having the audit of a single independent branch or 10 independent branch of the same company, it is to be counted as a single audit assignment
But if the auditor is having an audit of HO along with its say, 10 branches then it will be counted as only 1 audit assignment (this is the case of dependent branch)
Means audit of independent branches are to be counted as one audit assignment whereas audit of dependent branches are not to be counted for the purpose of celling no. of audit assignment...