I laugh at how vague this is. It's the Transport Canada standard for the Aircraft Operating manual I'm required to have on board. But if you go by the regulation, it seems more important that it contain page numbering than data.
624.27 Aircraft Operating Manual
An aircraft operating manual shall consist of the following:
(a) a table of contents;
(b) a list of effective pages;
(c) amending procedures;
(d) a preamble;
(e) the identification of the aeroplane by the type and registration, that the manual applies to; and
(f) the aeroplane's operating procedures and limitations.
My current one also contains a quantity of mildew, and a really charming atomic age users guide to the oxygen system, which I keep meaning to bring back to the hotel to blog about.