Section 334(ii) in Bihar Board's Miscellaneous Rules, 1958
(ii)The result of this verification may be of great use to the District Officers in furnishing the half-yearly return of maps, prescribed in rule (i) below. Some of the District Officers may therefore, prefer to do checking in April or in October. But neither of these months is entirely suitable, the weather being very hot in April in most districts and the first fortnight of October is not infrequently a period of heavy rains. It is, therefore, left to the Commissioner to fix the month in which the verification in each District is to be carried out, provided that the work is not allowed to interfere with touring.