Section 71A(4) in The Indian Post Office Rules, 1933
(4)A single enquiry fee shall be levied when the enquiry relates to several registered articles posted at the same time by the same sender to the same addressee. This will not however, apply in the case of registered articles posted in India and addressed to Bhutan, Nepal or Pakistan. However, in the case of registered articles which had, at sender's request, to be forwarded by different routes, separate fee shall be collected for each of the routes used.
