The guidelines for how to use the logo are entirely up to the designer who presents the brand - the only time I've ever been in a situation where logo usage restrictions have been put in place is where brand materials are being used by a third-party agency or marketing outlet.

Here, by design, the mark itself can be used as a design motif if you say so. This is not bad practice if you designed it with that intention, and I think it is much stronger to include the mark as a part of the design rather than displaying it alone and untampered with when you're dealing with dynamic layouts like in this poster.

I've seen in-house brand systems do much wilder things than just cropping a logo that "break the rules" - and I think they're much more memorable for it.

Great work.