(5)The Corporation shall be deemed to have complied with the provisions of sub-section (1) or sub-section (2) or sub-section (3), in respect of a zonal office or a divisional office, other than the central office, or a branch of the Corporation, whether within or outside India, if proper books of account relating to the transactions effected at such office or branch, are kept thereat and proper summarised returns are sent periodically to the central office or the corresponding zonal office or the corresponding divisional office, or to the other place referred to in sub-section (4).