Signs, banners, and placards are permitted as a part of a permitted activity. All supports for these items must not exceed three quarters (¾) of an inch at their largest point, have dull ends, and made entirely of wood. There can be no nails, screws, or bolt-type fastening devices protruding from the wooden supports. These items may not be used to offer any item for sale, to solicit contributions or contain any form of advertising. Any display of signs, banners, placards, and related items is strictly prohibited inside all Capitol Buildings.How big,what materials for backing and any other rules, Thanks.