before the end of the tenth working day after the day on which the construction plan is submitted to the review authority, in the case of a small or very small construction activity site, or the fourteenth working day after the day on which the construction plan is submitted to the review authority, in the case of a large construction activity site, the project site owner may submit a notice of intent letter including the information required by 327 IAC 15-5-5 or the general permit and, forty-eight (48) hours after submission of the notice of intent letter, may begin the construction project, including the land disturbing activities of the construction project.
the land disturbing activities of the construction project must stop when the review authority notifies the project site owner of the review authority's conclusive unfavorable determination concerning the construction plan.
IC 13-18-27-16