1 Mark things with [Bv2.1_paragraph]
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9 immersive audio DCPs must comply with 429-18, 429-19 [*] don't have these standards
10 6.2 Language and Territory must comply with RFC 5646
11 - subtitle reel <Language> /
12 - subtitle XML <Language>
13 - sound reel <Language>
14 - ccap reel <Language>
15 - MainSubtitleLanguageList
16 - RFC5646SpokenLanguage
17 - CPL metadata ReleaseTerritory