Section 98.17 - Period covered by Plan(a) For States, Territories, and Indian Tribes the Plan shall cover a period of three years.(b) The Lead Agency shall submit a new Plan prior to the expiration of the time period specified in paragraph (a) of this section, at such time as required by the Secretary in written instructions.63 FR 39981, July 24, 1998, as amended at 81 FR 67578, Sept. 30, 2016