If an agency finds that an imminent peril to the public health, safety or welfare requires adoption of a rule upon fewer than twenty-five (25) days' notice and states in writing its reasons for that finding, it may proceed without prior notice of hearing or upon any abbreviated notice and hearing that it finds practicable to adopt an emergency rule. The rule may be effective for a period of not longer than one hundred twenty (120) days, renewable once for a period not exceeding ninety (90) days, but the adoption of an identical rule under subsection (1) of this section is not precluded.