Briefs to the administrative law judge shall be filed within the following periods, as applicable:

(a) Fourteen (14) days after the close of the oral evidentiary hearing, unless the administrative law judge determines that, under the circumstances of the case, briefs are not necessary or that the parties will require more time to prepare briefs; or

(b) Fourteen (14) days after the filing of additional evidence called for in the order establishing further procedures if no oral evidentiary hearing is called for, unless the DOT decisionmaker determines that some other period should be allowed.