11 May 2015
On March 31, as per the closing rate the following entry is passed since there is a gain.
Creditors a/c Dr Exch diff a/c Cr
On 1st of April, the above entry has been reversed. Effect: While making payments, exch diff is calculated between liability booking amount & payment amt but not b/w Mar 31st restated amount & payment amount.
11 May 2015
No reversal is required for such liability. There will be a Dr in Exchange diff a/c due to reversal which will take care of the effect before 31st March. AS 11 is followed in passing the entries.