Technically, the same rule applies. In practicality, if only the first two lines of a poem would fit on the first page, I might move the whole thing to the next page just for ease of reading...especially if I could then get the whole poem on one page.
And yes, the same rules would apply for displayed material. The only difference for displayed material is the cell in which the poem lines begin and runover (the margins).
Happy Thanksgiving!
Cindi