The ASL Rulebook was reformatted away from the traditional Avalon Hill format used in their smaller games. The ASL Rulebook was modeled after Amarillo Design Bureau's Star Fleet Battles rulebook, a format that better supported the "massive" game that ASL had become. Based on military field manuals, the rule book was contained in a three-ring binder. Each chapter was color-coded along the top of the page, with brightly colored section dividers of heavy cardboard stock reproducing charts and diagrams associated with that chapter. Errata would be provided on a regular basis, and coupons in the back of the rulebook could be exchanged by mail for the initial updates to the rulebook. The errata would come in the form of altered pages, with page numbers annotated with the date of any changes; old pages were simply removed from the binder and discarded and the new page inserted. The two largest updates were the '87 and '89 sections that came with many pages. The first edition rules shipped with Chapter A, B, C, D, H, J, and N. Chapter N was a visual inventory of all game pieces included in Beyond Valor and several follow up modules but was not fully supported. While early modules did contain the appropriate Chapter N pages, some modules did not have the pages included immediately (Paratrooper's Chapter N pages, for example, were not provided until the release of Yanks). HASL modules did not have associated Chapter N pages, and neither did Doomed Battalions.