(1) An arbitrator may declare a hearing closed after specifically inquiring from the parties whether they have any further evidence to give and the parties have answered in the negative.

(2) If closing statements are to be filed, a hearing shall be declared closed as of the last date for the submission of the statements.

(3) If a document is to be filed and the date for the filing of the document is after the date for the submission of statements, the last date for the filing of the document shall be the date of the closing of the hearing.