(a) Content. All briefs shall conform to the requirements of section 500.1 of this Part and contain a table of contents, a table of cases and authorities, questions presented, point headings, and, if necessary, a disclosure statement pursuant to section 500.1(f) of this Part. Such disclosure statement shall be included before the table of contents in the party's principal brief. Appellant's brief shall include a statement showing that the court has jurisdiction to entertain the appeal and to review