What tuning is Taproot's song 'Poem' in?

Hello all. I've been wanting to learn Taproot's 'Poem' on guitar but
I can't seem to find the correct tuning. Some places said
Standard...some Drop D...and then another one said way down in A
Standard. I can't figure out tunings by ear (at least not yet), so if
anyone knows for sure what tuning it's in and could let me know, that
would be greatly appreciated.

I know Taproot uses A Standard in at least some of their other songs,
but I haven't heard a lot of their stuff so I'm unsure whether they
jump around all over the place with tunings or just stay in the same
general area.

Thanks.