When is this Class D airspace not Class D airspace?
Great question. The short answer to your question is &quot;Full Time.&quot; Ultimately that Class D airspace will be incorporated into the LAX Class B, but there is a lot of red tape involved so step one was to add the Class D extensions, then it will be incorpoated into LAX Class B at a later date. Its a big deal, Title 14 CFR Part 71 had to be amended, here is the Federal Register page that explains the rule change. By the way, you're not alone in being confused about the effective hours, apparently that language was erroneously included in the charts and had to be removed.