that the State agency shall insure that each participating household receive a notice of expiration of its certification prior to the start of the last month of its certification period advising the household that it must submit a new application in order to renew its eligibility for a new certification period and, further, that each such household which seeks to be certified another time or more times thereafter by filing an application for such recertification no later than fifteen days prior to the day upon which its existing certification period expires shall, if found to be still eligible, receive its allotment no later than one month after the receipt of the last allotment issued to it pursuant to its prior certification, but if such household is found to be ineligible or to be eligible for a smaller allotment during the new certification period it shall not continue to participate and receive benefits on the basis authorized for the preceding certification period even if it makes a timely request for a fair hearing pursuant to paragraph (10) of this subsection: Provided , That the timeliness standards for submitting the notice of expiration and filing an application for recertification may be modified by the Secretary in light of sections 2014(f)(2) and 2015(c) of this title if administratively necessary;