(a) In the course of an investigation, evidence normally will be collected following the procedures described in §§ 270.312 through 270.315 of this subpart.

(b) Upon a written showing by the Lead Investigator of urgent and compelling reasons to believe that evidence may be destroyed, or that a witness may become unavailable, were the procedures described in §§ 270.312 through 270.314 of this subpart followed, the Director, with the concurrence of the General Counsel, may immediately issue a subpoena for such evidence or testimony, pursuant to § 270.315 of this subpart.