Section 800.35 - Participation of interested persons(a) Any interested person may participate in a rulemaking proceeding by submitting written comments,information, views or arguments.(b) In its discretion, the agency may invite any interested person to participate in the rulemaking procedures described in this subpart. 80 FR 57309 , Sept. 23, 2015, as amended at 81 FR 75731 , Nov. 1, 2016