Each handler shall file each year with the Committee written reports of his carryover of dates as of March 1, October 1, and at such other times as the Committee may prescribe: Provided, That during those seasons when volume regulations are established by the Secretary, the handler shall file an additional report on his January 1 carryover. Such reports shall be filed within 10 days of the date of the carryover. These reporting dates specified may be changed, upon recommendation of the Committee, together with substantiation of the need therefore, with the approval of the Secretary.