Remove Header & Navigation From Specific Pages

Good morning,

I am trying to remove the header and navigation from specific pages in the evolve theme with custom CSS. I have tried a few different way that have all been unsuccessful. I saw a previous post on here inquiring about the home page, but I need a few different ones.

The site I am managing is http://www.thegblstory.com but the specific page is http://www.thegblstory.com/NAAFA. On the NAAFA page, they would like the Group Benefits, Ltd. and menu bar to disappear on this particular page, leaving just the NAAFA image at the top. Is this possible?

Thank you for your fantastic theme!