Notwithstanding anything contained in these rules, where a seat is reserved under the proviso to sub-section (3) of section 7,-
(i) for a person belonging to category-A of the backward classes, the Returning officer may accept nomination papers from person belonging to both category-A and category-B of the backward classes, but shall return the nomination paper filled by a person belonging to category-B along with the deposit made, in case nomination paper is received from any person belonging to category-A, before the expiry of the date and time fixed for making nomination. However, he may proceed to consider the nomination paper filed by a candidate belonging to category-B only, when no nomination paper is received from a person belonging to category A, before the expiry of the date and time fixed for making nomination; and
(ii) for a person belonging to category-B of the backward classes the Returning officer may accept nomination papers from person belonging to both category-A and category-B of the backward classes but shall return the nomination paper filled by the person belonging to category-A along with the deposit made, in case nomination paper is received from any person belonging to category-B before the expiry of the date and time fixed for making nomination. However, he may proceed to consider the nomination paper filed by a candidate belonging to category-A only when no nomination paper is received from a person belonging to category-B, before the expiry of the date and time fixed for making nomination.