== Additional sections ==
Additional MAR file sections may be defined in the future. These sections If at least one additional section exists, the ADDITIONAL_SECTIONS header entry must follow directly after the SIGNATURES sectionbe present.
Each additional block must be in the format described abovein ADDITIONAL_SECTION_ENTRY.
The block separator in the ADDITIONAL_SECTIONS header is so the MAR reader code knows whether it is reading an additional block or if it is reading the INDEX.IndexSize.
The Block identifier is a value used to uniquely identify additional blocks so that they may be optionally added in any order.